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US006277189B1
(12) United States Patent ao) Patent No.: us 6,277,189 Bi
Chugh (45) Date of Patent: Aug. 21,2001
(54) COAL COMBUSTION BY-PRODUCTS-BASED LIGHTWEIGHT STRUCTURAL MATERIALS AND PROCESSES FOR MAKING THEM
(75) Inventor: Yoginder P. Chugh, Murphysboro, IL (US)
(73) Assignee: The Board of Trustees of Southern Illinois University, Carbondale, IL (US)
( * ) Notice: Subject to any disclaimer, the term ol this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 09/386,978
(22) Filed: Aug. 31, 1999
(51) Int. C I. C04B 7 13
(52) U.S. CI 106/705; 106/640; 106/708;
106/709; 106/711; 106/819; 106/823; 106/DIG. 1;
264/333
(58) Field of Search 106/705, 708,
106/709, 711, 640, 819, 823, DIG. 1; 264/333
(56) References Cited
U.S. PATENT DOCUMENTS
