A cap which can form an essentially leak-proof seal with an open-ended vessel capable of receiving and holding fluid specimens or other materials for analysis. To minimize potentially contaminating contact between a fluid sample present in the vessel and humans or the environment, the present invention...http://www.google.fr/patents/US7824922?utm_source=gb-gplus-shareBrevet US7824922 - Method for removing a fluid substance from a closed system
Method for removing a fluid substance from a closed system
