WO1998018022A1 - Seismic acquisition system using wireless telemetry - Google Patents
Seismic acquisition system using wireless telemetry Download PDFInfo
- Publication number
- WO1998018022A1 WO1998018022A1 PCT/GB1997/002924 GB9702924W WO9818022A1 WO 1998018022 A1 WO1998018022 A1 WO 1998018022A1 GB 9702924 W GB9702924 W GB 9702924W WO 9818022 A1 WO9818022 A1 WO 9818022A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- geophone
- acquisition system
- seismic
- seismic acquisition
- units
- Prior art date
Links
- 238000000034 method Methods 0.000 claims description 7
- 230000006870 function Effects 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000001413 cellular effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013144 data compression Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/22—Transmitting seismic signals to recording or processing apparatus
- G01V1/223—Radioseismic systems
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69724445T DE69724445T2 (en) | 1996-10-23 | 1997-10-23 | SEISMIC DATA ACQUISITION SYSTEM WITH WIRELESS TELEMETRY |
JP10519128A JP2001502429A (en) | 1996-10-23 | 1997-10-23 | Earthquake capture system using wireless telemetry |
US09/297,159 US6219620B1 (en) | 1996-10-23 | 1997-10-23 | Seismic acquisition system using wireless telemetry |
AU47167/97A AU4716797A (en) | 1996-10-23 | 1997-10-23 | Seismic acquisition system using wireless telemetry |
EP97909492A EP0934538B1 (en) | 1996-10-23 | 1997-10-23 | Seismic acquisition system using wireless telemetry |
CA002268939A CA2268939C (en) | 1996-10-23 | 1997-10-23 | Seismic acquisition system using wireless telemetry |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9622044.7 | 1996-10-23 | ||
GBGB9622044.7A GB9622044D0 (en) | 1996-10-23 | 1996-10-23 | Seismic surveying system |
GBGB9715967.7A GB9715967D0 (en) | 1997-07-30 | 1997-07-30 | Seismic surveying system |
GB9715967.7 | 1997-07-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998018022A1 true WO1998018022A1 (en) | 1998-04-30 |
Family
ID=26310272
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1997/002924 WO1998018022A1 (en) | 1996-10-23 | 1997-10-23 | Seismic acquisition system using wireless telemetry |
Country Status (10)
Country | Link |
---|---|
US (1) | US6219620B1 (en) |
EP (1) | EP0934538B1 (en) |
JP (1) | JP2001502429A (en) |
CN (1) | CN1151383C (en) |
AU (1) | AU4716797A (en) |
CA (1) | CA2268939C (en) |
DE (1) | DE69724445T2 (en) |
ES (1) | ES2205187T3 (en) |
RU (1) | RU2190241C2 (en) |
WO (1) | WO1998018022A1 (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0978733A2 (en) * | 1998-08-07 | 2000-02-09 | Input/Output, Inc. | Seismic telemetry system |
EP1080380A1 (en) * | 1998-05-15 | 2001-03-07 | Trimble Navigation, Ltd | Seismic survey system |
EP1198777A1 (en) * | 1999-05-24 | 2002-04-24 | Input/Output, Inc. | Remote control system for seismic acquisition |
GB2395630A (en) * | 2002-11-22 | 2004-05-26 | Westerngeco Seismic Holdings | Seismic surveying using intercoupled wireless cells |
EP1671158A2 (en) * | 2003-09-17 | 2006-06-21 | Input/Output, Inc. | Single station wireless seismic data acquisition method and apparatus |
EP1995609A1 (en) * | 2007-05-23 | 2008-11-26 | Vibration Technology Limited | Seismic data acquisition |
US7725264B2 (en) | 2006-09-29 | 2010-05-25 | Ion Geophysical Corporation | In-field control module for managing wireless seismic data acquisition systems and related methods |
US7729202B2 (en) | 2006-09-29 | 2010-06-01 | Ion Geophysical Corporation | Apparatus and methods for transmitting unsolicited messages during seismic data acquisition |
US7894301B2 (en) | 2006-09-29 | 2011-02-22 | INOVA, Ltd. | Seismic data acquisition using time-division multiplexing |
US8077740B2 (en) | 2007-02-01 | 2011-12-13 | INOVA, Ltd. | Apparatus and method for reducing noise in seismic data |
US8135543B2 (en) | 2006-06-10 | 2012-03-13 | Inova Ltd. | Apparatus and method for integrating survey parameters into a header |
US8325561B2 (en) | 2006-06-10 | 2012-12-04 | Inova Ltd. | Digital elevation model for use with seismic data acquisition systems |
US8335128B2 (en) | 1998-08-07 | 2012-12-18 | INOVA, Ltd. | Single station wireless seismic data acquisition method and apparatus |
US8605546B2 (en) | 2006-09-29 | 2013-12-10 | Inova Ltd. | Seismic data acquisition systems and method utilizing a wireline repeater unit |
US8908472B2 (en) | 2006-06-09 | 2014-12-09 | Inova Ltd. | Heads-up navigation for seismic data acquisition |
Families Citing this family (51)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7668044B2 (en) * | 2002-04-24 | 2010-02-23 | Ascend Geo, Llc | Data offload and charging systems and methods |
US20060009911A1 (en) * | 2002-04-24 | 2006-01-12 | Ascend Geo, Llc | Methods and systems for acquiring and processing seismic data |
US7298671B2 (en) * | 2002-04-24 | 2007-11-20 | Ascend Geo, Llc | Seismic-data acquisition methods and apparatus |
US6934219B2 (en) | 2002-04-24 | 2005-08-23 | Ascend Geo, Llc | Methods and systems for acquiring seismic data |
US6944096B2 (en) * | 2002-08-21 | 2005-09-13 | Westerngeco, L.L.C. | Method of accurately determining positions of deployed seismic geophones |
US20050047275A1 (en) * | 2003-09-01 | 2005-03-03 | Geo-X Systems, Ltd. | Synchronization and positioning of seismic data acquisition systems |
US7813221B2 (en) * | 2002-11-22 | 2010-10-12 | Westerngeco L.L.C. | Sensor and recorder communication |
WO2004095190A2 (en) | 2003-04-18 | 2004-11-04 | Fort Justin L | Techniques for surface exploration and monitoring |
US7117094B2 (en) * | 2003-07-17 | 2006-10-03 | Novatel, Inc. | Seismic measuring system including GPS receivers |
US8228759B2 (en) | 2003-11-21 | 2012-07-24 | Fairfield Industries Incorporated | System for transmission of seismic data |
US7124028B2 (en) * | 2003-11-21 | 2006-10-17 | Fairfield Industries, Inc. | Method and system for transmission of seismic data |
DE102005004869A1 (en) * | 2005-02-02 | 2006-08-10 | Geoforschungszentrum Potsdam | Exploration device and method for registering seismic vibrations |
US7177232B1 (en) * | 2005-03-21 | 2007-02-13 | The United States Of America As Represented By The Secretary Of The Navy | Wireless radio frequency hydrophone system |
US8599862B2 (en) * | 2005-07-28 | 2013-12-03 | Sercel | Data acquisition module and cable connector |
FR2963681B1 (en) * | 2010-08-04 | 2012-08-31 | Sercel Rech Const Elect | DATA ACQUISITION MODULE AND CABLE CONNECTOR FOR FIXING THE MODULE |
US8238199B2 (en) * | 2005-10-07 | 2012-08-07 | Wireless Seismic, Inc. | Wireless exploration seismic system |
US7773457B2 (en) * | 2005-10-07 | 2010-08-10 | Wireless Seismic | Wireless exploration seismic system |
US7224642B1 (en) | 2006-01-26 | 2007-05-29 | Tran Bao Q | Wireless sensor data processing systems |
US20070286022A1 (en) * | 2006-06-09 | 2007-12-13 | Input/Output, Inc. | Operating State Management for Seismic Data Acquisition |
US20080080310A1 (en) * | 2006-09-29 | 2008-04-03 | Ion Geophysical Corporation | Seismic Data Acquisition Systems and Methods for Managing Messages Generated by Field Units |
WO2008091880A1 (en) * | 2007-01-23 | 2008-07-31 | Adobe Systems, Incorporated | System and method for simulating shallow water effects on arbitrary surfaces |
EP2034336A1 (en) * | 2007-09-07 | 2009-03-11 | Vibration Technology Limited | Data transmission system |
WO2009038769A1 (en) | 2007-09-21 | 2009-03-26 | Geospace Technologies, Lp | Low- power satellite-timed seismic data acquisition system |
US9128202B2 (en) * | 2008-04-22 | 2015-09-08 | Srd Innovations Inc. | Wireless data acquisition network and operating methods |
US8217803B2 (en) * | 2008-04-22 | 2012-07-10 | Srd Innovations Inc. | Wireless data acquisition network and operating methods |
GB0810977D0 (en) * | 2008-06-16 | 2008-07-23 | Qinetiq Ltd | Phase based sensing |
US8254207B2 (en) * | 2008-09-22 | 2012-08-28 | Geza Nemeth | System and method for seismic data acquisition |
US9304220B2 (en) * | 2008-12-23 | 2016-04-05 | Westerngeco L.L.C. | Handling equipment failure in a subterranean survey data acquisition network |
US20100208551A1 (en) * | 2009-02-13 | 2010-08-19 | Daniel Golparian | Configuring wireless seismic acquisition networks |
US20110310701A1 (en) * | 2009-12-15 | 2011-12-22 | Gerard Schuster | Seismic Telemetry and Communications System |
CA2728007A1 (en) * | 2010-01-13 | 2011-07-13 | Srd Innovations Inc. | Link sensitive aodv for wireless data transfer |
RU2461847C2 (en) * | 2010-07-08 | 2012-09-20 | Общество с ограниченной ответственностью "Геофизическая служба" | Method for continuous monitoring of physical state of buildings and/or structures and apparatus for realising said method |
CN101995585A (en) * | 2010-08-31 | 2011-03-30 | 成都林海电子有限责任公司 | System for real-time monitoring safety of large-sized building based on satellite communication |
CN101995582A (en) * | 2010-08-31 | 2011-03-30 | 成都林海电子有限责任公司 | Satellite communication-based earthquake real-time monitoring system |
CN101988968A (en) * | 2010-09-02 | 2011-03-23 | 成都林海电子有限责任公司 | Wireless network-based earthquake monitoring system and implementation method thereof |
CN101995583B (en) * | 2010-09-02 | 2013-02-13 | 成都林海电子有限责任公司 | Wired network-based earthquake real-time monitoring method |
RU2442999C1 (en) * | 2010-10-21 | 2012-02-20 | Общество с ограниченной ответственностью "Сибирская геофизическая научно-производственная компания" | Programmed measurement system |
CN102176050B (en) * | 2011-02-17 | 2013-05-08 | 四川西南交大铁路发展有限公司 | Earthquake monitoring and pre-warning device and working method thereof |
US9119019B2 (en) | 2011-07-11 | 2015-08-25 | Srd Innovations Inc. | Wireless mesh network and method for remote seismic recording |
CA2841455A1 (en) * | 2011-07-19 | 2013-01-24 | Conocophillips Company | Multiple frequency geophone strings |
EP2770343A4 (en) * | 2011-10-17 | 2016-06-01 | Inst Geology & Geophysics Cas | Wired, wireless and cableless all_in_one digital seismometer |
CN104122586B (en) * | 2013-04-24 | 2017-02-08 | 中国石油集团东方地球物理勘探有限责任公司 | Wireless node data monitoring method of seismic exploration |
CN103278842B (en) * | 2013-05-23 | 2015-04-08 | 朱江 | Earthquake predicting and pre-warning system based on ground source ultrasonic wave monitoring and analysis |
RU2543084C2 (en) * | 2013-05-30 | 2015-02-27 | Олег Игоревич Шнурков | Lowered prospecting module "svetlyachok" |
CN104656574B (en) * | 2013-11-20 | 2017-12-29 | 中国石油天然气集团公司 | One kind divides the inspection of gap auto-control and monitoring method based on time domain |
US10209381B2 (en) | 2014-02-19 | 2019-02-19 | Cgg Services Sas | Systems and methods for wireless data acquisition in seismic monitoring systems |
US10270541B2 (en) * | 2016-04-27 | 2019-04-23 | Magseis Ff Llc | Optical link management |
CN106405628A (en) * | 2016-06-06 | 2017-02-15 | 保定市全正石油物探装备制造有限公司 | Earth crust shock collection system |
US10880881B2 (en) | 2018-05-15 | 2020-12-29 | King Fahd University Of Petroleum And Minerals | Systems and methods for collision prevention and power conservation in wireless networks |
CN108508477B (en) * | 2018-05-28 | 2020-06-09 | 中国石油天然气集团有限公司 | Seismic data acquisition system and method |
CN111751869B (en) * | 2019-03-29 | 2023-06-30 | 中国石油天然气集团有限公司 | Seismic exploration data forwarding method, repeater, related equipment and transmission system |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3886494A (en) * | 1972-11-13 | 1975-05-27 | Exxon Production Research Co | System for gathering and recording seismic signals |
US4815044A (en) * | 1986-05-30 | 1989-03-21 | Institut Francais Du Petrole | Seismic signal transmission system using relay radios |
EP0646809A1 (en) * | 1993-09-30 | 1995-04-05 | Institut Francais Du Petrole | Method and device for acquisition of seismic signals |
DE19519164A1 (en) * | 1994-05-26 | 1995-12-14 | Inst Francais Du Petrole | Decentralised control system for coordinating operations using e.g. seismic equipment installed in wide ranging zone |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2671197A1 (en) * | 1990-12-28 | 1992-07-03 | Inst Francais Du Petrole | METHOD AND DEVICE FOR SIMPLIFYING THE LOCATION OF AN UNDERGROUND AREA IN THE CONTEXT OF A SEISMIC EXPLORATION. |
US5724241A (en) * | 1996-01-11 | 1998-03-03 | Western Atlas International, Inc. | Distributed seismic data-gathering system |
-
1997
- 1997-10-23 EP EP97909492A patent/EP0934538B1/en not_active Expired - Lifetime
- 1997-10-23 AU AU47167/97A patent/AU4716797A/en not_active Abandoned
- 1997-10-23 WO PCT/GB1997/002924 patent/WO1998018022A1/en active IP Right Grant
- 1997-10-23 DE DE69724445T patent/DE69724445T2/en not_active Expired - Lifetime
- 1997-10-23 RU RU99111963/28A patent/RU2190241C2/en active
- 1997-10-23 CN CNB971990344A patent/CN1151383C/en not_active Expired - Lifetime
- 1997-10-23 ES ES97909492T patent/ES2205187T3/en not_active Expired - Lifetime
- 1997-10-23 US US09/297,159 patent/US6219620B1/en not_active Expired - Lifetime
- 1997-10-23 CA CA002268939A patent/CA2268939C/en not_active Expired - Lifetime
- 1997-10-23 JP JP10519128A patent/JP2001502429A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3886494A (en) * | 1972-11-13 | 1975-05-27 | Exxon Production Research Co | System for gathering and recording seismic signals |
US4815044A (en) * | 1986-05-30 | 1989-03-21 | Institut Francais Du Petrole | Seismic signal transmission system using relay radios |
EP0646809A1 (en) * | 1993-09-30 | 1995-04-05 | Institut Francais Du Petrole | Method and device for acquisition of seismic signals |
DE19519164A1 (en) * | 1994-05-26 | 1995-12-14 | Inst Francais Du Petrole | Decentralised control system for coordinating operations using e.g. seismic equipment installed in wide ranging zone |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1080380A1 (en) * | 1998-05-15 | 2001-03-07 | Trimble Navigation, Ltd | Seismic survey system |
EP1080380A4 (en) * | 1998-05-15 | 2001-10-31 | Trimble Navigation Ltd | Seismic survey system |
US7218890B1 (en) | 1998-08-07 | 2007-05-15 | Input/Output, Inc. | Seismic telemetry system |
US8335128B2 (en) | 1998-08-07 | 2012-12-18 | INOVA, Ltd. | Single station wireless seismic data acquisition method and apparatus |
EP0978733A3 (en) * | 1998-08-07 | 2002-10-16 | Input/Output, Inc. | Seismic telemetry system |
US8004933B2 (en) | 1998-08-07 | 2011-08-23 | INOVA, Ltd. | Single station wireless seismic data acquisition method and apparatus |
EP0978733A2 (en) * | 1998-08-07 | 2000-02-09 | Input/Output, Inc. | Seismic telemetry system |
US7613071B2 (en) | 1998-08-07 | 2009-11-03 | Ion Geophysical Corporation | Seismic telemetry system with steerable antennas |
EP1198777A4 (en) * | 1999-05-24 | 2005-06-22 | Input Output Inc | Remote control system for seismic acquisition |
EP1198777A1 (en) * | 1999-05-24 | 2002-04-24 | Input/Output, Inc. | Remote control system for seismic acquisition |
GB2395630A (en) * | 2002-11-22 | 2004-05-26 | Westerngeco Seismic Holdings | Seismic surveying using intercoupled wireless cells |
GB2395630B (en) * | 2002-11-22 | 2007-08-22 | Westerngeco Seismic Holdings | Seismic acquisition system |
US7573782B2 (en) | 2002-11-22 | 2009-08-11 | Westerngeco L. L. C. | Seismic acquisition system |
EP1671158A2 (en) * | 2003-09-17 | 2006-06-21 | Input/Output, Inc. | Single station wireless seismic data acquisition method and apparatus |
EP1671158A4 (en) * | 2003-09-17 | 2010-10-13 | Inova Ltd | Single station wireless seismic data acquisition method and apparatus |
US8908472B2 (en) | 2006-06-09 | 2014-12-09 | Inova Ltd. | Heads-up navigation for seismic data acquisition |
US8135543B2 (en) | 2006-06-10 | 2012-03-13 | Inova Ltd. | Apparatus and method for integrating survey parameters into a header |
US8325561B2 (en) | 2006-06-10 | 2012-12-04 | Inova Ltd. | Digital elevation model for use with seismic data acquisition systems |
US7729202B2 (en) | 2006-09-29 | 2010-06-01 | Ion Geophysical Corporation | Apparatus and methods for transmitting unsolicited messages during seismic data acquisition |
US7894301B2 (en) | 2006-09-29 | 2011-02-22 | INOVA, Ltd. | Seismic data acquisition using time-division multiplexing |
US8605546B2 (en) | 2006-09-29 | 2013-12-10 | Inova Ltd. | Seismic data acquisition systems and method utilizing a wireline repeater unit |
US7725264B2 (en) | 2006-09-29 | 2010-05-25 | Ion Geophysical Corporation | In-field control module for managing wireless seismic data acquisition systems and related methods |
US8077740B2 (en) | 2007-02-01 | 2011-12-13 | INOVA, Ltd. | Apparatus and method for reducing noise in seismic data |
US8982810B2 (en) | 2007-02-01 | 2015-03-17 | Inova Ltd. | Apparatus and method for reducing noise in seismic data |
EP1995609A1 (en) * | 2007-05-23 | 2008-11-26 | Vibration Technology Limited | Seismic data acquisition |
Also Published As
Publication number | Publication date |
---|---|
EP0934538A1 (en) | 1999-08-11 |
RU2190241C2 (en) | 2002-09-27 |
US6219620B1 (en) | 2001-04-17 |
EP0934538B1 (en) | 2003-08-27 |
CA2268939A1 (en) | 1998-04-30 |
ES2205187T3 (en) | 2004-05-01 |
JP2001502429A (en) | 2001-02-20 |
DE69724445D1 (en) | 2003-10-02 |
DE69724445T2 (en) | 2004-06-17 |
AU4716797A (en) | 1998-05-15 |
CN1151383C (en) | 2004-05-26 |
CN1234121A (en) | 1999-11-03 |
CA2268939C (en) | 2006-08-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2268939C (en) | Seismic acquisition system using wireless telemetry | |
US5276655A (en) | Method and device for simplifying the localization of a subsurface zone within the scope of a seismic exploration | |
US4086504A (en) | Distributed data acquisition | |
US4042906A (en) | Automatic data acquisition method and system | |
US5978313A (en) | Time synchronization for seismic exploration system | |
US5724241A (en) | Distributed seismic data-gathering system | |
US4905205A (en) | Method for transmitting to a central recording device seismic data collected by acquisition apparatus distributed over the ground and a device for implementing same | |
US4885724A (en) | Cableless seismic digital field recorder having on-site seismic data processing capabilities | |
RU99111963A (en) | SEISMIC DATA SYSTEM AND METHOD FOR SEISMIC EXPLORATION | |
CN102466813B (en) | Wireless remote sensing storage type seismograph system | |
US4807200A (en) | Method and apparatus for gathering seismic data and selectively controlling isolated distributed recorders in an isolated distributed recording system | |
US20080285385A1 (en) | Methods and systems for seismic event detection | |
US11269095B2 (en) | Cableless seismic acquisition with hierarchical communication protocol | |
US4112412A (en) | Digital seismic telemetry system | |
US20050047275A1 (en) | Synchronization and positioning of seismic data acquisition systems | |
CN1086317A (en) | Adopt the seismic transmission method and the system of centralized unit | |
US5467018A (en) | Method of processing transient electromagnetic measurements in geophysical analysis | |
CN101661111A (en) | Method for performing seismograph control and data transmission by using short message and short message control and transmission type cableless seismograph | |
CN102879812A (en) | Wireless exploration seismic system | |
CN109709542A (en) | A kind of portable system for high-frequency earth wave radar | |
US3881154A (en) | High resolution, very short pulse, ionosounder | |
US4296485A (en) | Tilt alarm in a seismic exploration system | |
JP3264350B2 (en) | Time generation device and method | |
CN102466814B (en) | Wireless remote sensing seismograph system | |
RU199415U1 (en) | CABLE-FREE SEISMIC DATA RECORDER |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 97199034.4 Country of ref document: CN |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW AM AZ BY KG KZ MD RU TJ TM |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH KE LS MW SD SZ UG ZW AT BE CH DE DK ES FI FR GB GR IE IT LU MC |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1997909492 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2268939 Country of ref document: CA Ref document number: 2268939 Country of ref document: CA Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 1998 519128 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 09297159 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 1997909492 Country of ref document: EP |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
WWG | Wipo information: grant in national office |
Ref document number: 1997909492 Country of ref document: EP |