WO9629752-A1 -- AT389020-B   ;  DE3210096-A   ;  EP206969-A   DEPT ENERGY MINES (ENER-Non-standard);  CANADIAN GOVERNMENT (CNDG);  CANADA MIN ENERGY MINES & RESOURCES (MIMC)   AHMAD A,  CANADAY J D,  HANSON A J,  KURIAKOSE A,  WHEAT T;  EP379372-A   MHB JOINT VENTURE (MHBJ-Non-standard)   LEE M T,  FAUTEUX D;  EP600470-A2   ASAHI GLASS CO LTD (ASAG)   UMEMURA K,  NAGANUMA T,  MIYAKE H;  GB1534359-A   KUREHA CHEM IND CO LTD (KURE);  JP04218267-A   ;  JP53123390-A   ;  JP58042626-A   ;  JP61181078-A   ;  US3266940-A   ;  US4073752-A   GOODRICH CO B F (GOOR);  US5919583-A -- US3282875-A   DU PONT DE NEMOURS & CO E I (DUPO);  US3664915-A   GORE (WL) (GORE);  US3953566-A   GORE & ASSOC INC W L (GORE)   GORE R W;  US3962153-A   GORE & ASSOC INC W L (GORE);  US4187390-A   GORE & ASSOC INC W L (GORE)   GORE R W;  US4358545-A   DOW CHEM CO (DOWC)   EZZELL B R,  CARL W P,  MOD W A;  US4940525-A   DOW CHEM CO (DOWC)   EZZELL B R,  CARL W P;  US5422411-A   BALLARD POWER SYSTEMS INC (BLRD)   WEI J,  STONE C,  STECK A E;  US5599638-A   UNIV SOUTHERN CALIFORNIA (USCA);  CALIFORNIA INST OF TECHNOLOGY (CALY)   FRANK H A,  NARAYANAN S R,  OLAH G A,  PRAKASH G K S,  SURAMPUDI S,  VAMOS E,  HALPERT G;  US5766787-A   TANAKA KIKINZOKU KOGYO KK (TANI);  WATANABE M (WATA-Individual)   WATANABE M,  UCHIDA H;  EP815606-B1 -- AT389020-B   ;  DE3210096-A   ;  EP206969-A   DEPT ENERGY MINES (ENER-Non-standard);  CANADIAN GOVERNMENT (CNDG);  CANADA MIN ENERGY MINES & RESOURCES (MIMC)   AHMAD A,  CANADAY J D,  HANSON A J,  KURIAKOSE A,  WHEAT T;  EP379372-A   MHB JOINT VENTURE (MHBJ-Non-standard)   LEE M T,  FAUTEUX D;  EP600470-A2   ASAHI GLASS CO LTD (ASAG)   UMEMURA K,  NAGANUMA T,  MIYAKE H;  GB1534359-A   KUREHA CHEM IND CO LTD (KURE);  JP04218267-A   ;  JP53123390-A   ;  JP58042626-A   ;  JP61181078-A   ;  US3266940-A   ;  US4073752-A   GOODRICH CO B F (GOOR);  JP3827018-B2 -- EP631337-A2   TANAKA KIKINZOKU KOGYO KK (TANI);  WATANABE M (WATA-Individual)   WATANABE M,  UCHIDA H;  JP52008997-A   KUREHA CHEM IND CO LTD (KURE);  WO1994025993-A1