P

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 patents
US5128416AJul 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 patents

SUMITOMO RUBBER IND

3 patents

EISAI R&D MAN CO LTD

3 patents

SUMIMOTO RUBBER IND LTD

1 patent

SUMITMO CHEMICAL COMPANY LTD

1 patent

NIPPON ELECTRIC CO

1 patent

DENSO CORP

1 patent

IDEMITSU KOSAN CO

1 patent

SHIMADZU CORP

1 patent

EISAI KAGAKU KK

1 patent

TAKAHASHI HIROKI

1 patent

Showing the top 50 of 53 patents by PatentIndex Score.