WO200057506-A1 -- US4908157-A   US DEPT ENERGY (USAT);  ASSOCIATED UNIV INC (UYAS-Non-standard)   FONTANA J J,  ELLING D,  REAMS W;  US5250228-A   RAYCHEM CORP (RAYC)   BAIGRIE S,  CHU E F,  PARK G B,  REDDY V N,  RINDE J A,  SALTMAN R P;  US5516546-A   DEGUSSA AG (DEGS);  FOLLMANN & CO GES CHEMIEWERKSTOFFE (FOLL-Non-standard)   HARI S,  WENK D;  US5614581-A   GENCORP INC (GENT)   COBBLEDICK D S,  REICHENBACH D F;  US6251308-B1 -- US4197178-A   ORONZIO DE NORA IMPIANTI ELETR (ORON);  US4301222-A   ;  US4339322-A   GENERAL ELECTRIC CO (GENE)   BALKO E N,  LAWRANCE R J;  US4908157-A   US DEPT ENERGY (USAT);  ASSOCIATED UNIV INC (UYAS-Non-standard)   FONTANA J J,  ELLING D,  REAMS W;  US5108849-A   CANADA MIN NAT DEFENCE (MIND)   WATKINS D S,  DIRCKS K W,  EPP D G;  US5230966-A   BALLARD POWER SYSTEMS INC (BLRD)   VOSS H H,  CHOW C Y;  US5250228-A   RAYCHEM CORP (RAYC)   BAIGRIE S,  CHU E F,  PARK G B,  REDDY V N,  RINDE J A,  SALTMAN R P;  US5268400-A   BUDD CO (BUDD)   ISELER K A,  DUFFIELD P B,  YEN R C H;  US5342554-A   GENCORP INC (GENT)   LAJUDICE K P,  MELBY E G,  MCBAIN D S;  US5516546-A   DEGUSSA AG (DEGS);  FOLLMANN & CO GES CHEMIEWERKSTOFFE (FOLL-Non-standard)   HARI S,  WENK D;  US5614581-A   GENCORP INC (GENT)   COBBLEDICK D S,  REICHENBACH D F;  US5686199-A   ALLIED-SIGNAL INC (ALLC)   WALSWORTH E,  CAVALCA C,  HOMEYER S T;  US5744816-A   PREMIX INC (PREM-Non-standard)   BUTLER K I;  US5854317-A   PREMIX INC (PREM-Non-standard)   RINZ J E;  US5942347-A   INST GAS TECHNOLOGY (IGTE)   KONCAR G J,  MARIANOWSKI L G;  US5998510-A   PREMIX INC (PREM-Non-standard)   BUTLER K I;  US6007933-A   PLUG POWER LLC (PLUG-Non-standard)   JONES D O;  WO2000025372-A1   ;  AU761468-B -- US4908157-A   US DEPT ENERGY (USAT);  ASSOCIATED UNIV INC (UYAS-Non-standard)   FONTANA J J,  ELLING D,  REAMS W;  US5614581-A   GENCORP INC (GENT)   COBBLEDICK D S,  REICHENBACH D F;  KR713299-B1 -- US4908157-A   US DEPT ENERGY (USAT);  ASSOCIATED UNIV INC (UYAS-Non-standard)   FONTANA J J,  ELLING D,  REAMS W;  US5614581-A   GENCORP INC (GENT)   COBBLEDICK D S,  REICHENBACH D F;  EP1171925-B1 -- US4908157-A   US DEPT ENERGY (USAT);  ASSOCIATED UNIV INC (UYAS-Non-standard)   FONTANA J J,  ELLING D,  REAMS W;  US5250228-A   RAYCHEM CORP (RAYC)   BAIGRIE S,  CHU E F,  PARK G B,  REDDY V N,  RINDE J A,  SALTMAN R P;  US5516546-A   DEGUSSA AG (DEGS);  FOLLMANN & CO GES CHEMIEWERKSTOFFE (FOLL-Non-standard)   HARI S,  WENK D;  US5614581-A   GENCORP INC (GENT)   COBBLEDICK D S,  REICHENBACH D F;  JP4885360-B2 -- JP03093821-A   ;  JP06320681-A   ;  JP08199011-A   ;  JP11502804-W   ;  WO1999005737-A1