Inventor · disambiguated record
Iwakazu Hattori
Also filed as: HATTORI IWAKAZU
32 granted patents·8 pending applications·1,778 citations·filing 1981–2023
98Inventor score
Top patents by PatentIndex Score
40 records- 0198US6992147B1Modified polymers prepared with lanthanide-based catalystsBRIDGESTONE CORP·Filed 2000·Granted Jan 31, 2006·178 cites·14 claims
- 0298US5064910APreparation of conjugated diene polymers modified with an organo-tin or germanium halideJAPAN SYNTHETIC RUBBER CO LTD·Filed 1989·Granted Nov 12, 1991·211 cites·25 claims
- 0398US4906706AModified conjugated diene polymer and process for production thereofJAPAN SYNTHETIC RUBBER CO LTD·Filed 1987·Granted Mar 6, 1990·201 cites·23 claims
- 0497US7294680B2Method of producing conjugated diene polymers with narrow molecular weight distribution and polymer producedJSR CORP·Filed 2004·Granted Nov 13, 2007·135 cites·14 claims
- 0597US6838526B1Modified conjugated diene polymer and method of producing the same and rubber compositionJSR CORP·Filed 2000·Granted Jan 4, 2005·116 cites·4 claims
- 0696US7750087B2Modified polymers prepared with lanthanide-based catalystsBRIDGESTONE CORP·Filed 2005·Granted Jul 6, 2010·18 cites·20 claims
- 0796US6194505B1Rubber composition for solid golf ball and solid golf ballJSR CORP·Filed 1998·Granted Feb 27, 2001·194 cites·8 claims
- 0896US4894409ARubber compositionJAPAN SYNTHETIC RUBBER CO LTD·Filed 1988·Granted Jan 16, 1990·103 cites·13 claims
- 0995US7642322B2Functionalized high cis-1,4-polybutadiene prepared using novel functionalizing agentsBRIDGESTONE CORP·Filed 2005·Granted Jan 5, 2010·19 cites·16 claims
- 1095US5017636ARubber compositions from modified trans-polybutadiene and rubber for tiresJAPAN SYNTHETIC RUBBER CO LTD·Filed 1990·Granted May 21, 1991·94 cites·19 claims
- 1192US6255416B1Method of producing conjugated diene polymersJSR CORP·Filed 1999·Granted Jul 3, 2001·88 cites·8 claims
- 1286US6391990B1Method of producing conjugated diene polymerJSR CORP·Filed 2000·Granted May 21, 2002·32 cites·5 claims
- 1386US5206301AHydrogenated block copolymer and composition comprising the sameJAPAN SYNTHETIC RUBBER CO LTD·Filed 1989·Granted Apr 27, 1993·40 cites·6 claims
- 1485US6838538B2Hydrogenated modified polymer, process for producing the same and composition containing the sameJSR CORP·Filed 2002·Granted Jan 4, 2005·26 cites·21 claims
- 1585US6747085B2Conjugated diene polymer and rubber compositionJSR CORP·Filed 2002·Granted Jun 8, 2004·21 cites·10 claims
- 1684US5548045AProcess for producing polybutadieneJAPAN SYNTHETIC RUBBER CO LTD·Filed 1994·Granted Aug 20, 1996·49 cites·6 claims
- 1784US5432232ARubber compositionsJAPAN SYNTHETIC RUBBER CO LTD·Filed 1993·Granted Jul 11, 1995·50 cites·3 claims
- 1883US5086136AProcess for producing high trans low vinyl conjugated diene (co)polymerJAPAN SYNTHETIC RUBBER CO LTD·Filed 1990·Granted Feb 4, 1992·41 cites·26 claims
- 1982US6130299AMethod for preparing conjugated diene polymerJSR CORP·Filed 1997·Granted Oct 10, 2000·43 cites·18 claims
- 2075US6548598B2Thermoplastic resin compositionJSR CORP·Filed 2001·Granted Apr 15, 2003·16 cites·14 claims
- 2174US4933401ACatalyst composition for polymerization of conjugated diene and process for producing conjugated diene polymerJAPAN SYNTHETIC RUBBER CO LTD·Filed 1989·Granted Jun 12, 1990·22 cites·22 claims
- 2274US4433109AStyrene-butadiene block copolymerJAPAN SYNTHETIC RUBBER CO LTD·Filed 1981·Granted Feb 21, 1984·23 cites·8 claims
- 2372US8618199B2Functionalized high cis-1,4-polybutadiene prepared using novel functionalizing agentsOZAWA YOICHI F·Filed 2012·Granted Dec 31, 2013·1 cites·11 claims
- 2471US6191234B1Conjugated diolefin-based copolymer rubber and composition thereofJSR CORP·Filed 1998·Granted Feb 20, 2001·25 cites·8 claims
- 2566US8987362B2Functionalized high cis-1,4-polybutadiene prepared using novel functionalizing agentsBRIDGESTONE CORP·Filed 2013·Granted Mar 24, 2015·0 cites·10 claims
- 2663US9644052B2Functionalized high cis-1,4-polybutadiene prepared using novel functionalizing agentsBRIDGESTONE CORP·Filed 2015·Granted May 9, 2017·0 cites·4 claims
- 2762US8362126B2Functionalized high cis-1,4-polybutadiene prepared using novel functionalizing agentsOZAWA YOICHI·Filed 2009·Granted Jan 29, 2013·0 cites·7 claims
- 2860US2025215210A1Diene rubber composition and method for producing sameETIC INC·Filed 2023·Application pending·0 cites
- 2959US2008200602A1Block copolymer, rubber composition containing the same and molded productJSR CORP·Filed 2008·Application pending·0 cites
- 3059US2008200606A1Block copolymer, rubber composition containing the same and molded productJSR CORP·Filed 2008·Application pending·0 cites
- 3155US5527860AProcess for producing a diolefin polymer or copolymer and a rubber composition containing such a diolefin polymer or copolymerJAPAN SYNTHETIC RUBBER CO LTD·Filed 1994·Granted Jun 18, 1996·12 cites·19 claims
- 3254US2006106150A1Block copolymer, rubber composition containing the same and molded productJSR CORP·Filed 2005·Application pending·0 cites
- 3352US2010015442A1Adhesive composition, method for producing the same and adhesive bodyJSR CORP·Filed 2007·Application pending·0 cites
- 3446US5034465ARubber compositionsBRIDGESTONE CORP·Filed 1989·Granted Jul 23, 1991·9 cites·2 claims
- 3543US6887929B2Resin composition and golf ballJSR CORP·Filed 2002·Granted May 3, 2005·0 cites·28 claims
- 3643US6291596B1Catalyst and process for hydrogenating olefinically unsaturated compoundJSR CORP·Filed 1999·Granted Sep 18, 2001·11 cites·28 claims
- 3741US2008051536A1Method for Producing (Co) Polymer Having Carboxyl GroupJSR CORP·Filed 2005·Application pending·0 cites
- 3840US2007112158A1Novel (co)polymer, process for producing the same, and process for producing carboxylated (co)polymerJSR CORP·Filed 2004·Application pending·0 cites
- 3938US10428161B2Method for producing modified solution-polymerized diene rubber to be blended with silica, and rubber composition containing sameETIC INC·Filed 2015·Granted Oct 1, 2019·0 cites·9 claims
- 4038US2016122501A1Rubber composition comprising emulsion-polymerized conjugated diene polymer and silica suspension, and method for producing sameETIC INC·Filed 2014·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →