;  US6967063-B2 -- US1931492-A   ;  US2824620-A   ;  US2889273-A   ;  US3144312-A   ;  US3197284-A   ;  US3208198-A   ;  US3336730-A   ;  US3338681-A   ;  US3350176-A   ;  US3368329-A   ;  US3450500-A   ;  US3469944-A   ;  US3476534-A   UNITED TECHNOLOGIES CORP (UNAC);  US3524819-A   LUMMUS CO (LUMM);  US3645701-A   LUMMUS CO (LUMM);  US3665680-A   ENGELHARD MINERALS & CHEM CORP (ENGH);  US3713270-A   NAT RES DEV CORP (NATR);  US3732155-A   ;  US3839193-A   ;  US3881891-A   URALSKY POLIT INST KIROV (URA-Non-standard);  US3955941-A   CALIF INST TECH (CALT-Non-standard)   HOUSEMAN J,  RUPE J H,  KUSHIDA R O;  US3965252-A   ASHLAND OIL INC (ASHL)   KMECAK R A,  KOVACH S M;  US3969222-A   ;  US3972695-A   ;  US3978004-A   RHONE-PROGIL (RHON);  US3980452-A   METALLGESELLSCHAFT AG (METG);  US4003725-A   TRIENCO INC (TRIE-Non-standard)   BUNN J W,  BUCKLEY C O;  US4056373-A   RESOURCE SYSTEMS IN (RESO-Non-standard)   RUBIN L R;  US4127393-A   BRITISH GAS CORP (GASC)   TIMMINS C,  CONWAY H L,  STROUD H J F;  US4177163-A   ;  US4234458-A   UOP INC (UNVO)   ANTOS G J;  US4254086-A   SANDERS A P (SAND-Individual)   SANDERS A P;  US4272357-A   ;  US4400182-A   BRITISH GAS CORP (GASC)   DAVIES H S,  GARSTANG J H,  TIMMINS C;  US4415484-A   UNITED TECHNOLOGIES CORP (UNAC)   SETZER H J,  LESIEUR R R,  KARAVOLIS S,  WNUCK W G;  US4451578-A   UNITED TECHNOLOGIES CORP (UNAC)   SETZER H J,  LESIEUR R R,  BETT J A S;  US4468235-A   HILL E F (HILL-Individual)   HILL E F;  US4472176-A   RESOURCE SYSTEMS IN (RESO-Non-standard)   RUBIN L R;  US4473543-A   UNITED TECHNOLOGIES CORP (UNAC)   SETZER H J,  LESIEUR R R,  KARAVOLIS S,  WNUCK W G;  US4503029-A   UNITED TECHNOLOGIES CORP (UNAC)   SETZER H J;  US4522894-A   ENGELHARD MINERALS CORP (ENGH)   HWANG H S,  HECK R M,  YARRINGTON R M;  US4539310-A   KELLOGG CO M W (PULL)   LEFTIN H P,  PATIL K Z;  US4553981-A   UNION CARBIDE CORP (UNIC)   FUDERER A;  US4589891-A   KERNFORSCHUNGSANLAGE JUELICH (KERJ);  JULIAN LAB INC (JULI)   INIOTAKIS N,  DECKEN C B,  FROHLING W;  US4632774-A   STANDARD OIL CO OHIO (STAH)   FOX J R,  PESA F A,  CURATOLO B S;  US4654063-A   AIR PROD & CHEM INC (AIRP)   AGRAWAL R,  AUVIL S R;  US4690690-A   IMPERIAL CHEM IND PLC (ICIL)   SMITH A S,  DOY R J,  LIMBACH A P;  US4693882-A   INT FUEL CELLS CORP (ITFU)   SETZER H J,  KARAVOLIS S,  BETT J A S;  US4695366-A   UNION OIL CO CALIFORNIA (UNOC)   MILLER J W,  WARD J W;  US4699637-A   KERNFORSCHUNGSANLAGE JUELICH (KERJ);  HERAEUS GMBH W C (HERA)   DECKEN C B,  FEDDERS H,  FROHLING W,  INIOTAKIS N,  SERNETZ F;  US4713234-A   KERNFORSCHUNGSANLAGE JUELICH (KERJ)   WEIRICH W,  BARNET H,  OERTEL M,  SCHULTEN R;  US4743353-A   ;  US4750986-A   IMPERIAL CHEM IND PLC (ICIL)   PINTO A,  TWIGG M V;  US4755498-A   INT FUEL CELLS CORP (ITFU)   SETZER H J,  KARRAVOLIS S,  BETT J A S,  KARAVOLIS S;  US4780300-A   MITSUBISHI JUKOGYO KK (MITO)   YOKOYAMA N,  IMAI T,  FUJITA H,  MURAKAMI M,  MIYAIRI Y,  TAMAI M;  US4781241-A   INT FUEL CELLS CORP (ITFU)   MISAGE R,  SCHEFFLER G W,  SETZER H J,  MARGIOTT P R,  PARENTI E K;  US4788004-A   IMPERIAL CHEM IND PLC (ICIL)   PINTO A,  DAVIDSON P J,  LIMBACH A P J;  US4797195-A   AMOCO CORP (STAD)   KUKES S G,  GUTBERLET L C,  MILLER J T;  US4810485-A   INST GAS TECHNOLOGY (IGTE)   MARIANOWSK L G,  FLEMING D K;  US4830834-A   HALDOR TOPSOE AS (TOPS);  STAHL H O (STAH-Individual);  EPRI ELEC POWER RES (EPRI-Non-standard)   STAHL H O,  ROSTRUPNIE J R;  US4838897-A   HITACHI LTD (HITA)   AMANO Y,  YOKOYAMA E,  OOYACHI H;  US4849187-A   TOYO ENG CORP (TOXS)   UOZU H,  NAITOH A,  NUMAGUCHI T;  US4865624-A   NIPPON SANSO KK (NIIO)   OKADA H;  US4897181-A   ;  US4904455-A   STONE & WEBSTER ENG CORP (STWE)   KARAFIAN M,  TSANG I C;  US4906176-A   HITACHI LTD (HITA)   YAMASHITA H,  KATO A,  UNO S,  MIZUMOTO M,  MATSUDA S;  US4909808-A   NAT AERO & SPACE ADMIN (USAS)   VOECKS G E;  US4938685-A   IMPERIAL CHEM IND PLC (ICIL)   PINTO A,  DAVIDSON P J,  LIMBACH A P J;  US4940532-A   ;  US4946667-A   ENGELHARD MINERALS CORP (ENGH)   BESHTY B S,  WHELAN J A;  US4981676-A   MINET R G (MINE-Individual)   MINET R G,  TSOTSIS T T;  US5004592-A   IMPERIAL CHEM IND PLC (ICIL)   PINTO A,  TWIGG M V;  US5026536-A   NIPPON OIL KK (NIOC);  PETROLEUM ENERGY CENTER (PETR-Non-standard);  ZH SEIKIYU SANGYO KASSEI (SEKI-Non-standard)   SHIOIRI T,  SATAKE S,  SEKIDO Y,  FUJISOU T,  OBUCHI A,  KATO H;  US5039510-A   IMPERIAL CHEM IND PLC (ICIL)   PINTO A,  TWIGG M V;  US5041208-A   MOBIL OIL CORP (MOBI)   PARTRIDGE R D,  SCHORBERT M A,  WONG S S F;  US5110563-A   IMPERIAL CHEM IND PLC (ICIL)   PINTO A,  DAVIDSON P J,  LIMBACH A P J;  US5112578-A   MITSUBISHI GAS CHEM CO INC (MITN)   MURAYAMA K,  YAMAGUCHI M,  NAKAMURA T;  US5130114-A   IGARASHI A (IGAR-Individual)   IGARASHI A;  US5130115-A   NIPPON OIL KK (NIOC);  SEKIYU SANGYO KASSEIKA (SEKI-Non-standard)   FUJISOU T,  HAYASHI S,  KATO H,  NOMURA S,  OBUCHI A,  FUJIMUNE T;  US5156821-A   ;  US5205841-A   TPC TECHNOLOGIES INC (TPCT-Non-standard)   VAIMAN L A;  US5211837-A   ;  US5215729-A   BUXBAUM R E (BUXB-Individual)   BUXBAUM R E;  US5226928-A   TOKYO ELECTRIC POWER CO (TOEP);  KOBE SEIKO SHO KK (KOBM)   MAKABE T,  SATO H,  HAGIWARA A,  AOKI M,  SUGIMURA H,  KAWABATA T;  US5264202-A   AIR PROD & CHEM INC (AIRP)   SNYDER G D;  US5270272-A   UOP (UNVO)   HAIZMANN R S,  GALPERIN L;  US5326550-A   UNIV BRITISH COLUMBIA (UYBR)   ADRIS A M,  GRACE J R,  LIM C J,  ELNASHAIE S S;  US5336394-A   IDEMITSU KOSAN CO LTD (IDEK);  PETROLEUM ENERGY CENT (PETR-Non-standard)   IINO A,  IWAMOTO R,  MITANI T;  US5354547-A   AIR PROD & CHEM INC (AIRP)   RAO M B,  SIRCAR S,  ABRARDO J M,  BAADE W F;  US5356851-A   INST FRANCAIS DU PETROLE (INSF)   SARRAZIN P,  BOITIAUX J;  US5376167-A   INST FRANCAIS DU PETROLE (INSF)   BROUTIN P,  BUISSON A,  LEGOIT P;  US5382271-A   IND TECHNOLOGY RES INST (ITRI)   CHENG Y,  NG M L,  YOUNG M;  US5389595-A   UNION OIL CO CALIFORNIA (UNOC)   SIMPSON H D,  SURHEIL A F,  ABDO S F;  US5393325-A   BEND RES INC (BEND-Non-standard)   EDLUND D J;  US5411927-A   COUNCIL SCI & IND RES INDIA (COUI)   CHOUDHARY V R,  RANE V H,  RAJPUT A M R;  US5449848-A   AGENCY OF IND SCI & TECHNOLOGY (AGEN)   ITO N;  US5458857-A   ROLLS ROYCE & ASSOC LTD (RORO)   COLLINS R D,  OAKLEY M J;  US5484577-A   BALLARD POWER SYSTEM INC (BLRD)   LEAVITT S L,  WATKINS D S,  COHEN R,  BUSWELL R F,  CLAUSI J V;  US5498278-A   BEND RES INC (BEND-Non-standard)   EDLUND D J;  US5510201-A   H-POWER CORP (HPOW-Non-standard)   WERTH J;  US5516344-A   INT FUEL CELLS CORP (ITFU)   CORRIGAN T J;  US5518530-A   NGK INSULATORS LTD (NIGA)   SAKAI O,  TAKAHASHI T,  ABE T,  FUJII T;  US5525322-A   UNIV CALIFORNIA (REGC)   WILLMS R S;  US5612012-A   NGK INSULATORS LTD (NIGA)   SOMA T,  TAKAHASHI T,  ISOMURA M;  US5637259-A   CANADA MIN NATURAL RESOURCES (CNDG)   AHMED S,  PANDEY R N,  GALUSZKA J Z,  FOUDA S;  US5639431-A   TOKYO GAS CO LTD (TOLG);  MITSUBISHI JUKOGYO KK (MITO)   SHIRASAKI Y,  GONDAIRA M,  OHTA Y,  UCHIDA H,  KURODA K,  UCHIDA T,  FUJIMOTO Y,  MAKIHARA H,  OHTA S,  KOBAYASHI K;  US5645626-A   BEND RES INC (BEND-Non-standard)   EDLUND D J,  FROST C B,  NEWBOLD D D;  US5756421-A   COUNCIL SCI&IND RES INDIA (COUI)   SANSARE S D,  MAMMAN A S,  PRABHAKAR B,  RAJPUT A M,  CHOUDHARY V R;  US5772707-A   DAIMLER-BENZ AG (DAIM)   WIESHEU N,  ZUR MEGEDE D,  AUTENRIETH R;  US5782960-A   MITSUBISHI JUKOGYO KK (MITO)   OGAWA W,  KOBAYASHI T,  SUEDA N,  MATSUMOTO T,  IMAI T,  SHIROGANE S,  SHIOTA H,  UCHIDA T;  US5821185-A   ELTRON RES INC (ELTR-Non-standard)   SAMMELLS A F,  SCHWARTZ M,  WHITE J H;  US5846406-A   ;  US5861137-A   EDLUND D J (EDLU-Individual)   EDLUND D J;  US5888273-A   BUXBAUM R E (BUXB-Individual)   BUXBAUM R E;  US5897970-A   NGK INSULATORS LTD (NIGA)   ISOMURA M,  SOMA T,  TAKAHASHI T;  US5929286-A   UNIV CHICAGO (UYCG)   KRUMPELT M,  AHMED S,  KUMAR R,  DOSHI R;  US5931987-A   BUXBAUM R E (BUXB-Individual)   BUXBAUM R E;  US5938800-A   MCDERMOTT TECHNOLOGY INC (MCDE-Non-standard)   VERRILL C L,  MCILROY R A,  PRIVETTE R M,  CHANEY L J,  KNEIDEL K E;  US5989503-A   DAIMLER-BENZ AG (DAIM)   WIESHEU N,  ZUR MEGEDE D,  AUTENRIETH R;  US5997594-A   NORTHWEST POWER SYSTEMS LLC (BLRD)   EDLUND D J,  PLEDGER W A;  US5997835-A   HALDOR TOPSOE AS (TOPS)   HYLDTOFT J,  NORSKOV J K,  CLAUSEN B S;  US6013173-A   UOP LLC (UNVO)   BOGDAN P L;  US6056936-A   ELF AQUITAINE PRODN (ERAP)   NOUGAYREDE J,  PHILIPPE A;  US6063723-A   CHEVRON RES & TECHNOLOGY CO (CALI)   MILLER S J;  US6083379-A   PHILLIPS PETROLEUM CO (PHIP)   DRAKE C A,  LOVE S D;  US6083425-A   LITTLE INC ARTHUR D (LITT)   CLAWSON L G;  US6103143-A   AIR PROD & CHEM INC (AIRP)   SIRCAR S,  HUFTON J R,  NATARAJ S;  US6110861-A   UNIV CHICAGO (UYCG)   KRUMPELT M,  AHMED S,  KUMAR R,  DOSHI R;  US6123913-A   LITTLE INC ARTHUR D (LITT)   CLAWSON L G;  US6126908-A   LITTLE INC ARTHUR D (LITT)   CLAWSON L G;  US6152995-A   NORTHWEST POWER SYSTEMS LLC (BLRD)   EDLUND D J;  US20020114747-A1   ;  US20020172630-A1   ;  US6168650-B1   BUXBAUM R E (BUXB-Individual)   BUXBAUM R E;  US6171574-B1   JUDA ASSOC INC WALTER (JUDA-Non-standard)   JUDA W,  KRUEGER C W;  US6180081-B1   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   POSCHMANN T,  WIELAND S;  US6183543-B1   BUXBAUM R E (BUXB-Individual)   BUXBAUM R E;  US6207122-B1   LITTLE INC ARTHUR D (LITT)   CLAWSON L G;  US6221117-B1   NORTHWEST POWER SYSTEMS LLC (BLRD)   EDLUND D J,  PLEDGER W A;  US6221280-B1   ALLIED-SIGNAL INC (ALLC)   ANUMAKONDA A,  YAMANIS J,  FERRALL J;  US6238816-B1   TECHNOLOGY MANAGEMENT INC (TECH-Non-standard)   CABLE T L,  BRAKAS A B,  RUHL R C,  MILLIKEN C E;  US6416731-B1   HALDOR TOPSOE AS (TOPS)   DOHRUP J,  JACOBSEN C J H,  OLSEN C;  US6436363-B1   ENGELHARD CORP (ENGH)   HWANG H S,  FARRAUTO R J;  US6506359-B1   NIPPON CHEM PLANT CONSULTANT (NICH-Non-standard)   MARUKO S;  US6524550-B1   LITTLE INC ARTHUR D (LITT)   CHINTAWAR P,  THOMPSON C,  HAGAN M R;  US6576217-B1   MITSUBISHI HEAVY IND CO LTD (MITO)   NOJIMA S,  YASUTAKE T;  WO2000066487-A1   ;  WO2000078669-A1