Inventor
IMAI AKIO
JP53 patents
⚠️ This page may combine multiple inventors who share the name “IMAI AKIO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SUMITOMO CHEMICAL CO
33 patentsUS5128416AJul 7, 1992
Modified diene polymer rubbers
SUMITOMO CHEMICAL CO57 citations96
US5189109AFeb 23, 1993
Modified diene polymer rubbers
SUMITOMO CHEMICAL CO94 citations95
US4981760AJan 1, 1991
Ethylene-alpha-olefin copolymer and films obtained therefrom
SUMITOMO CHEMICAL CO84 citations94
US6187883B1Feb 13, 2001
Solid catalyst component for α-olefin polymerization, catalyst for α-olefin polymerization, and process for producing α-olefin polymer
SUMITOMO CHEMICAL CO46 citations93
US6100213AAug 8, 2000
Aluminum compound-containing solid catalyst component, catalyst for olefin polymerization and method for producing olefin polymer
SUMITOMO CHEMICAL CO17 citations92
US5219938AJun 15, 1993
Modified diene polymer rubbers
SUMITOMO CHEMICAL CO37 citations92
US5015692AMay 14, 1991
Process for preparing modified diene polymer rubbers
SUMITOMO CHEMICAL CO22 citations92
US5082908AJan 21, 1992
Ethylene-α-olefin copolymer and process for producing the same
SUMITOMO CHEMICAL CO27 citations91
US5608018AMar 4, 1997
α-olefin polymerization catalyst system and process for producing α-olefin catalyst
SUMITOMO CHEMICAL CO35 citations89
US4957976ASep 18, 1990
Process for preparing diene polymer rubbers
SUMITOMO CHEMICAL CO30 citations89
US4639494AJan 27, 1987
Process for producing polystyrene
SUMITOMO CHEMICAL CO21 citations82
US4537936AAug 27, 1985
Diene rubber composition, method of preparing the same and tire employing said composition
SUMITOMO CHEMICAL CO19 citations82
US4710554ADec 1, 1987
Polybutadiene and process for preparing the same
SUMITOMO CHEMICAL CO7 citations74
US4647614AMar 3, 1987
Diene elastomer compositions
SUMITOMO CHEMICAL CO7 citations74
US4523618AJun 18, 1985
Branched polymer, process for the preparation thereof, tire tread rubber composition and tire
SUMITOMO CHEMICAL CO17 citations74
US4436873AMar 13, 1984
Conjugated diene block polymer and process for preparing the same
SUMITOMO CHEMICAL CO11 citations74
US6838412B2Jan 4, 2005
α-Olefin polymerization catalyst and process for producing α-olefin polymer
SUMITOMO CHEMICAL CO7 citations73
US6333388B1Dec 25, 2001
Aluminum compound-containing solid catalyst component, catalyst for olefin polymerization and method for producing olefin polymer
SUMITOMO CHEMICAL CO10 citations73
US6331501B1Dec 18, 2001
Catalyst for α-olefin polymerization and process for producing α-olefin polymer
SUMITOMO CHEMICAL CO10 citations73
US6066704AMay 23, 2000
Transition metal complex, catalyst for olefin polymerization, and process for producing olefin polymers
SUMITOMO CHEMICAL CO13 citations73
US4885338ADec 5, 1989
Modified diene polymer rubbers
SUMITOMO CHEMICAL CO9 citations73
US4087484AMay 2, 1978
Process for producing transparent block copolymer resin
SUMITOMO CHEMICAL CO15 citations73
US5854164ADec 29, 1998
Method for preparing catalyst component for olefin polymerization, catalyst for olefin polymerization and process for producing olefin polymer with the catalyst
SUMITOMO CHEMICAL CO14 citations71
US4918142AApr 17, 1990
Rubber composition of tire tread containing block copolymer coupled with dicarboxylic acid ester
SUMITOMO CHEMICAL CO8 citations71
US5189108AFeb 23, 1993
Modified polymer rubber and process for preparing the same
SUMITOMO CHEMICAL CO4 citations63
US5037891AAug 6, 1991
Modified ethylene-α-olefin copolymer rubber and a process for producing the same
SUMITOMO CHEMICAL CO5 citations63
US4743652AMay 10, 1988
Elastomeric copolymer of aromatic vinyl compounds and butadiene
SUMITOMO CHEMICAL CO6 citations63
US6051526AApr 18, 2000
α-olefin polymerization catalyst and process for producing α-olefin polymer
SUMITOMO CHEMICAL CO2 citations62
US5122493AJun 16, 1992
Catalyst for olefinic hydrocarbon polymerization and process for producing olefinic hydrocarbon polymer
SUMITOMO CHEMICAL CO3 citations62
US4845173AJul 4, 1989
Process for producing thermoplastic elastomers
SUMITOMO CHEMICAL CO5 citations62
US4812527AMar 14, 1989
Rubber composition for tire treads containing dicarboxylic acid diester coupled block polymers
SUMITOMO CHEMICAL CO1 citations52
US6133189AOct 17, 2000
α-olefin polymerization catalyst and process for producing α-olefin polymer
SUMITOMO CHEMICAL CO1 citations51
US5191041AMar 2, 1993
Catalyst for olefinic hydrocarbon polymerization and process and producing olefinic hydrocarbon polymer
SUMITOMO CHEMICAL CO1 citations51
EISAI CO LTD
3 patentsUS5985864ANov 16, 1999
Polymorphs of donepezil hydrochloride and process for production
EISAI CO LTD118 citations95
US6245911B1Jun 12, 2001
Donepezil polycrystals and process for producing the same
EISAI CO LTD82 citations94
US6140321AOct 31, 2000
Polymorphs of donepezil hydrochloride and process for production
EISAI CO LTD75 citations94
SUMITOMO RUBBER IND
3 patentsEISAI R&D MAN CO LTD
3 patentsUS7332606B2Feb 19, 2008
Process for producing 1-benzyl-4-[(5,6-dimethoxy-1-indanon)-2-yl]methylpiperidine or hydrochloride thereof
EISAI R&D MAN CO LTD5 citations63
US7479563B2Jan 20, 2009
Method of producing polymorphic crystals of donepezil hydrochloride
EISAI R&D MAN CO LTD3 citations59
US7795438B2Sep 14, 2010
Processes for producing 1-benzyl-4-[(5,6-dimethoxy-1indanon)-2-yl]methylpiperidine and hydrochloride
EISAI R&D MAN CO LTD0 citations52
SUMIMOTO RUBBER IND LTD
1 patentSUMITMO CHEMICAL COMPANY LTD
1 patentNIPPON ELECTRIC CO
1 patentDENSO CORP
1 patentIDEMITSU KOSAN CO
1 patentSHIMADZU CORP
1 patentEISAI KAGAKU KK
1 patentTAKAHASHI HIROKI
1 patentShowing the top 50 of 53 patents by PatentIndex Score.