Assignee
MARUZEN PETROCHEM CO LTD
JP·98 granted patents·31 pending applications·846 citations·filing 1974–2023
Top patents by PatentIndex Score
129 records- 0192US4927979AProcess for the preparation of p-ethylphenolMARUZEN PETROCHEM CO LTD·Filed 1988·Granted May 22, 1990·49 cites·20 claims
- 0291US6462158B1Polymerizable compounds having norbornanelactone structure and polymersMARUZEN PETROCHEM CO LTD·Filed 2000·Granted Oct 8, 2002·27 cites·14 claims
- 0390US4049538AProcess for producing high-crystalline petroleum cokeMARUZEN PETROCHEM CO LTD·Filed 1975·Granted Sep 20, 1977·67 cites·6 claims
- 0489US7220808B2Thiol compound, copolymer and method for producing the copolymerMARUZEN PETROCHEM CO LTD·Filed 2004·Granted May 22, 2007·21 cites·5 claims
- 0589US4202868AProduction of high-density carbon materialsMARUZEN PETROCHEM CO LTD·Filed 1977·Granted May 13, 1980·46 cites·11 claims
- 0686US9994650B2Method for producing hydrogenated petroleum resinMARUZEN PETROCHEM CO LTD·Filed 2015·Granted Jun 12, 2018·8 cites·7 claims
- 0786US6787616B2Catalyst for olefin polymerization and process for polymerizing olefin by means thereofMARUZEN PETROCHEM CO LTD·Filed 2003·Granted Sep 7, 2004·30 cites·10 claims
- 0885US11485803B2Method for deodorizing hydrogenated petroleum resin, and method for producing hydrogenated petroleum resinMARUZEN PETROCHEM CO LTD·Filed 2019·Granted Nov 1, 2022·3 cites·3 claims
- 0984US5321177AProcess for the vapor-phase thermal cracking of dicyclopentadiene and a process for the manufacture of high purity dicyclopentadieneMARUZEN PETROCHEM CO LTD·Filed 1992·Granted Jun 14, 1994·28 cites·6 claims
- 1084US5304692ACatalyst composition for disproportionation of olefins and process for disproportionation of olefins using the sameMARUZEN PETROCHEM CO LTD·Filed 1992·Granted Apr 19, 1994·27 cites·11 claims
- 1182US4927885APolypropylene resin compositionsMARUZEN PETROCHEM CO LTD·Filed 1988·Granted May 22, 1990·38 cites·18 claims
- 1281US4705618AProcess for the preparation of an intermediate pitch for manufacturing carbon productsMARUZEN PETROCHEM CO LTD·Filed 1986·Granted Nov 10, 1987·30 cites·7 claims
- 1380US7960494B2Copolymer for semiconductor lithography and process for producing the sameMARUZEN PETROCHEM CO LTD·Filed 2007·Granted Jun 14, 2011·5 cites·15 claims
- 1479US4952639ANovel hydrogenated petroleum resin and process for preparing the sameMARUZEN PETROCHEM CO LTD·Filed 1988·Granted Aug 28, 1990·29 cites·2 claims
- 1578US11220563B2Production method for hydrogenated petroleum resinMARUZEN PETROCHEM CO LTD·Filed 2018·Granted Jan 11, 2022·2 cites·20 claims
- 1678US5284930AProcess for purifying vinylphenol polymers for use as photoresist materialsMARUZEN PETROCHEM CO LTD·Filed 1992·Granted Feb 8, 1994·35 cites·18 claims
- 1778US4522688AProcess for recovery of cyclopentadienesMARUZEN PETROCHEM CO LTD·Filed 1983·Granted Jun 11, 1985·15 cites·6 claims
- 1877US6461788B1Polymerizable compounds having cyclohexanelactone structure and polymersMARUZEN PETROCHEM CO LTD·Filed 2000·Granted Oct 8, 2002·14 cites·10 claims
- 1976US7695889B2Copolymer for semiconductor lithography and process for production thereofMARUZEN PETROCHEM CO LTD·Filed 2006·Granted Apr 13, 2010·4 cites·18 claims
- 2076US7342087B2Method for prevention of increase in particles in copolymer for semiconductor resistMARUZEN PETROCHEM CO LTD·Filed 2005·Granted Mar 11, 2008·4 cites·9 claims
- 2175US6323149B1Catalyst component and catalyst containing the component for polymerization of olefinsMARUZEN PETROCHEM CO LTD·Filed 2000·Granted Nov 27, 2001·7 cites·8 claims
- 2275US2024092724A1New bifunctional (meth)acrylate compound and polymerMARUZEN PETROCHEM CO LTD·Filed 2023·Application pending·0 cites
- 2374US6569800B2Catalyst component for polymerization of olefins, polymerization catalyst and process of polymerization of olefins by using the sameMARUZEN PETROCHEM CO LTD·Filed 2001·Granted May 27, 2003·10 cites·8 claims
- 2474US3959115AProduction of petroleum cokesMARUZEN PETROCHEM CO LTD·Filed 1974·Granted May 25, 1976·17 cites·3 claims
- 2573US5182011AProcess for preparing pitchesMARUZEN PETROCHEM CO LTD·Filed 1990·Granted Jan 26, 1993·27 cites·29 claims
- 2672US5736030AProcess for manufacturing fine particles of pitch with a high softening pointMARUZEN PETROCHEM CO LTD·Filed 1995·Granted Apr 7, 1998·27 cites·18 claims
- 2771US9777085B2Method for producing homopolymer or random copolymer of hydroxyl group-containing vinyl etherMARUZEN PETROCHEM CO LTD·Filed 2013·Granted Oct 3, 2017·2 cites·9 claims
- 2871US2025320386A1Additive for hot melt adhesive and hot melt adhesive compositionMARUZEN PETROCHEM CO LTD·Filed 2023·Application pending·0 cites
- 2968US6627714B2Method for producing an olefin type copolymer having a cyclic structureMARUZEN PETROCHEM CO LTD·Filed 2001·Granted Sep 30, 2003·10 cites·20 claims
- 3068US2025282903A1Copolymer of hydroxystyrene-based monomer and (meth)acrylic acid ester-based monomer, and production method thereofMARUZEN PETROCHEM CO LTD·Filed 2023·Application pending·0 cites
- 3167US11919850B2Bifunctional (meth)acrylate compound and polymerMARUZEN PETROCHEM CO LTD·Filed 2019·Granted Mar 5, 2024·0 cites·2 claims
- 3265US12319766B2Core-shell-type polymer fine particles having phosphonic acid or phosphonic acid ester structure, particle dispersion, molded article, and method for producing said fine particlesMARUZEN PETROCHEM CO LTD·Filed 2020·Granted Jun 3, 2025·0 cites·14 claims
- 3364US6506946B1Process for continuous production of acetylenediolMARUZEN PETROCHEM CO LTD·Filed 2002·Granted Jan 14, 2003·4 cites·6 claims
- 3464US6350831B1Process for the polymerization of olefins using a catalyst containing a novel catalyst componentMARUZEN PETROCHEM CO LTD·Filed 1998·Granted Feb 26, 2002·15 cites·26 claims
- 3564US5929204AProcess for removing metals from vinylphenol-type polymersMARUZEN PETROCHEM CO LTD·Filed 1998·Granted Jul 27, 1999·17 cites·21 claims
- 3663US5091072AProcess for preparing pitchesMARUZEN PETROCHEM CO LTD·Filed 1990·Granted Feb 25, 1992·18 cites·16 claims
- 3762US7411097B2Thiol compound, copolymer and method for producing the copolymerMARUZEN PETROCHEM CO LTD·Filed 2007·Granted Aug 12, 2008·1 cites·2 claims
- 3862US6743863B2Resin composition comprising ethylene-based polymers and process for its productionMARUZEN PETROCHEM CO LTD·Filed 2002·Granted Jun 1, 2004·6 cites·7 claims
- 3961US11814351B2Bifunctional (meth)acrylate compound and polymerMARUZEN PETROCHEM CO LTD·Filed 2019·Granted Nov 14, 2023·0 cites·8 claims
- 4061US9546133B2Method for producing copolymer for semiconductor lithography containing reduced amount of metal impurities, and method for purifying polymerization initiator for production of copolymerMARUZEN PETROCHEM CO LTD·Filed 2015·Granted Jan 17, 2017·0 cites·7 claims
- 4161US5521260AThermosetting resin compositionMARUZEN PETROCHEM CO LTD·Filed 1994·Granted May 28, 1996·14 cites·30 claims
- 4260US11725078B2Method for producing acid-decomposable polymerMARUZEN PETROCHEM CO LTD·Filed 2020·Granted Aug 15, 2023·0 cites·7 claims
- 4360US11377507B2Method for producing vinyl ether polymer containing oxyethylene chain by radical polymerizationMARUZEN PETROCHEM CO LTD·Filed 2018·Granted Jul 5, 2022·0 cites·6 claims
- 4460US10711079B2Method for producing vinyl ether polymer having hydroxyl group on side chain and temperature-responsive polymer mixtureMARUZEN PETROCHEM CO LTD·Filed 2016·Granted Jul 14, 2020·0 cites·17 claims
- 4560US9574106B2Optical element material and method for producing sameMARUZEN PETROCHEM CO LTD·Filed 2012·Granted Feb 21, 2017·2 cites·13 claims
- 4660US7435782B2ABA tri-block copolymerMARUZEN PETROCHEM CO LTD·Filed 2007·Granted Oct 14, 2008·2 cites·3 claims
- 4759US11891461B2Method for producing vinyl ether polymer containing hydrocarbon group by radical polymerizationMARUZEN PETROCHEM CO LTD·Filed 2019·Granted Feb 6, 2024·0 cites·5 claims
- 4859US11827729B2Method for producing polyvinylphosphonic acid copolymerMARUZEN PETROCHEM CO LTD·Filed 2019·Granted Nov 28, 2023·0 cites·20 claims
- 4959US4988791ANon-linear phosphazene polymer having schiff base structures, process for the preparation thereof, and curable phosphazene compositionMARUZEN PETROCHEM CO LTD·Filed 1989·Granted Jan 29, 1991·12 cites·10 claims
- 5059US2025101146A1Oxyethylene chain-containing polymerMARUZEN PETROCHEM CO LTD·Filed 2023·Application pending·0 cites
Showing the top 50 of 129 patent records by PatentIndex Score.
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