Inventor
WAKATSUKI KIZUKU
JP22 patents
⚠️ This page may combine multiple inventors who share the name “WAKATSUKI KIZUKU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SUMITOMO CHEMICAL CO
20 patentsUS5290878AMar 1, 1994
Butadiene copolymer and process for preparing same
SUMITOMO CHEMICAL CO86 citations96
US4603174AJul 29, 1986
Stretched polypropylene film
SUMITOMO CHEMICAL CO37 citations92
US4551501ANov 5, 1985
Crystalline propylene polymer composition
SUMITOMO CHEMICAL CO42 citations92
US4696979ASep 29, 1987
Process for producing propylene copolymer
SUMITOMO CHEMICAL CO19 citations79
US5039748AAug 13, 1991
High-strength polypropylene fiber
SUMITOMO CHEMICAL CO13 citations74
US4946895AAug 7, 1990
Resinous composition for powder coating
SUMITOMO CHEMICAL CO11 citations74
US4748207AMay 31, 1988
Polypropylene sheet
SUMITOMO CHEMICAL CO10 citations74
US5703151ADec 30, 1997
Rubber composition
SUMITOMO CHEMICAL CO17 citations73
US5245007ASep 14, 1993
Method for purifying ethylene-α-olefin copolymer
SUMITOMO CHEMICAL CO9 citations72
US4801650AJan 31, 1989
Process for producing 4-methylpentene-1 copolymer and resin composition containing the same
SUMITOMO CHEMICAL CO2 citations63
US4584239AApr 22, 1986
Stretched multilayer polypropylene film
SUMITOMO CHEMICAL CO2 citations63
US6087424AJul 11, 2000
Rubber composition
SUMITOMO CHEMICAL CO2 citations62
US5122493AJun 16, 1992
Catalyst for olefinic hydrocarbon polymerization and process for producing olefinic hydrocarbon polymer
SUMITOMO CHEMICAL CO3 citations62
US4663394AMay 5, 1987
Crystalline polybutene-1 compositions
SUMITOMO CHEMICAL CO2 citations62
US4350802ASep 21, 1982
Catalyst system for polymerization of olefins and process for production of polyolefins using the catalyst system
SUMITOMO CHEMICAL CO5 citations62
US4339560AJul 13, 1982
Process for polymerizing olefins
SUMITOMO CHEMICAL CO5 citations62
US5516862AMay 14, 1996
Process for producing ethylene-alpha-olefin copolymer rubber
SUMITOMO CHEMICAL CO2 citations61
US4883842ANov 28, 1989
Resin composition
SUMITOMO CHEMICAL CO2 citations61
US5191041AMar 2, 1993
Catalyst for olefinic hydrocarbon polymerization and process and producing olefinic hydrocarbon polymer
SUMITOMO CHEMICAL CO1 citations51
US4483939ANov 20, 1984
Process for producing polyolefin
SUMITOMO CHEMICAL CO1 citations51