Inventor
WAKAMATSU KAZUKI
JP37 patents
⚠️ This page may combine multiple inventors who share the name “WAKAMATSU KAZUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SUMITOMO CHEMICAL CO
36 patentsUS5132363AJul 21, 1992
Thermoplastic resin composition
SUMITOMO CHEMICAL CO80 citations96
US6337377B1Jan 8, 2002
Process for producing olefin polymers, olefin-polymerizing catalyst and polyproylene for biaxially oriented film produced with said catalyst
SUMITOMO CHEMICAL CO38 citations92
US6127303AOct 3, 2000
Process for producing olefin polymers, olefin-polymerizing catalyst and polypropylene for biaxially oriented film produced with said catalyst
SUMITOMO CHEMICAL CO35 citations92
US6110986AAug 29, 2000
Propylene-based polymer composition and foamed article thereof
SUMITOMO CHEMICAL CO28 citations92
US6057413AMay 2, 2000
Propylene-ethylene random copolymer film
SUMITOMO CHEMICAL CO35 citations92
US5773129AJun 30, 1998
Polypropylene laminated film
SUMITOMO CHEMICAL CO23 citations92
US5470900ANov 28, 1995
Powder molding process using a thermoplastic elastomer powder
SUMITOMO CHEMICAL CO27 citations92
US5268425ADec 7, 1993
Thermoplastic resin composition
SUMITOMO CHEMICAL CO32 citations92
US5115027AMay 19, 1992
Polypropylene stretched film
SUMITOMO CHEMICAL CO44 citations92
US4820775AApr 11, 1989
Alpha-olefin block copolymer particles and process for the production thereof
SUMITOMO CHEMICAL CO27 citations91
US6777497B2Aug 17, 2004
Polypropylene-based resin composition, process for producing the same and injection molded article
SUMITOMO CHEMICAL CO18 citations84
US5654372AAug 5, 1997
Polypropylene composition and the film thereof
SUMITOMO CHEMICAL CO18 citations83
US6645901B2Nov 11, 2003
Prepolymerization catalyst for use in gas phase polymerization of olefins and process for producing the same
SUMITOMO CHEMICAL CO14 citations79
US5141994AAug 25, 1992
Crystalline polypropylene and crystalline polypropylene composition
SUMITOMO CHEMICAL CO19 citations78
US6184319B1Feb 6, 2001
Olefin polymer, films or sheets made therefrom, and process for the production of olefin polymer
SUMITOMO CHEMICAL CO14 citations74
US5039748AAug 13, 1991
High-strength polypropylene fiber
SUMITOMO CHEMICAL CO13 citations74
US4337326AJun 29, 1982
Process for producing propylene-ethylene block copolymers
SUMITOMO CHEMICAL CO13 citations74
US4254237AMar 3, 1981
Process for producing propylene-ethylene block copolymers
SUMITOMO CHEMICAL CO7 citations74
US6573332B2Jun 3, 2003
Propylene-based copolymer, process for producing the same and film comprising the same
SUMITOMO CHEMICAL CO7 citations73
US6225414B1May 1, 2001
Propylene block copolymer
SUMITOMO CHEMICAL CO7 citations73
US6117946ASep 12, 2000
Propylene block copolymer
SUMITOMO CHEMICAL CO10 citations73
US6001293ADec 14, 1999
Process for producing polypropylene laminated film
SUMITOMO CHEMICAL CO8 citations73
US5486415AJan 23, 1996
Polypropylene laminate film
SUMITOMO CHEMICAL CO8 citations70
US5473021ADec 5, 1995
Process for producing ethylene-propylene block copolymer
SUMITOMO CHEMICAL CO15 citations69
US5449738ASep 12, 1995
Process for producing ethylene-propylene block copolymer
SUMITOMO CHEMICAL CO17 citations69
US5381827AJan 17, 1995
Gas distributor for use in gas phase polymerization apparatus
SUMITOMO CHEMICAL CO12 citations69
US6835791B2Dec 28, 2004
Stretched polypropylene film
SUMITOMO CHEMICAL CO6 citations63
US4801650AJan 31, 1989
Process for producing 4-methylpentene-1 copolymer and resin composition containing the same
SUMITOMO CHEMICAL CO2 citations63
US4259461AMar 31, 1981
Process for producing propylene-ethylene block copolymers
SUMITOMO CHEMICAL CO3 citations63
US7282537B2Oct 16, 2007
Propylene-based polymer, polypropylene resin composition, and injection molded article
SUMITOMO CHEMICAL CO5 citations62
US6451936B1Sep 17, 2002
Polypropylene random copolymer and film thereof
SUMITOMO CHEMICAL CO6 citations62
US6103841AAug 15, 2000
α-olefin polymers, α-olefin-polymerizing catalyst and process for producing α-olefin polymers
SUMITOMO CHEMICAL CO5 citations62
US4883842ANov 28, 1989
Resin composition
SUMITOMO CHEMICAL CO2 citations61
US7465772B2Dec 16, 2008
Apparatus for continuous polymerization of olefin, method for transferring a polymer powder, and method for continuous polymerization of olefin
SUMITOMO CHEMICAL CO3 citations55
US6710144B2Mar 23, 2004
Process for producing olefin polymer
SUMITOMO CHEMICAL CO0 citations44
US7858708B2Dec 28, 2010
Propylene-ethylene-butene block copolymer and molded article thereof
SUMITOMO CHEMICAL CO0 citations42