Assignee
SUMITOMO SEIKA CHEMICALS
JP·203 granted patents·186 pending applications·955 citations·filing 1989–2023
Top patents by PatentIndex Score
389 records- 0193US7776305B2Method for purification of nitrogen oxide and apparatus for purification of nitrogen oxideSUMITOMO SEIKA CHEMICALS·Filed 2006·Granted Aug 17, 2010·25 cites·4 claims
- 0293US5180798AProcess for production of water-absorbent resinSUMITOMO SEIKA CHEMICALS·Filed 1991·Granted Jan 19, 1993·87 cites·16 claims
- 0392US6979722B2Process for production of alkyllene oxide polymersSUMITOMO SEIKA CHEMICALS·Filed 2002·Granted Dec 27, 2005·43 cites·7 claims
- 0491US5567744AHigh water-absorbent resin compositionSUMITOMO SEIKA CHEMICALS·Filed 1993·Granted Oct 22, 1996·72 cites·11 claims
- 0589US5270439AMethod of producing a curable composition containing 4,4'-bis(methacryloylthio)diphenylsulfideSUMITOMO SEIKA CHEMICALS·Filed 1992·Granted Dec 14, 1993·37 cites·4 claims
- 0686US6777488B1Aqueous polyamide resin dispersion and process for producing the sameSUMITOMO SEIKA CHEMICALS·Filed 2000·Granted Aug 17, 2004·36 cites·13 claims
- 0785US9878304B2Method of manufacturing water-absorbent resin compositionSUMITOMO SEIKA CHEMICALS·Filed 2014·Granted Jan 30, 2018·11 cites·5 claims
- 0884US5326852AMethod for production of alkylene oxide polymersSUMITOMO SEIKA CHEMICALS·Filed 1992·Granted Jul 5, 1994·51 cites·11 claims
- 0984US5264236AMethod for production of hop extracts and hop extracts obtained therebySUMITOMO SEIKA CHEMICALS·Filed 1991·Granted Nov 23, 1993·47 cites·6 claims
- 1083US6573330B1Process for preparing water-absorbent resinSUMITOMO SEIKA CHEMICALS·Filed 1998·Granted Jun 3, 2003·63 cites·20 claims
- 1183US4917710AProcess for recovering oxygen enriched gasSUMITOMO SEIKA CHEMICALS·Filed 1989·Granted Apr 17, 1990·57 cites·8 claims
- 1282US10323105B2Water-absorbent resin and absorbent articleSUMITOMO SEIKA CHEMICALS·Filed 2014·Granted Jun 18, 2019·3 cites·6 claims
- 1382US9138722B2Method for producing water-absorbent resin particlesSUMITOMO SEIKA CHEMICALS·Filed 2013·Granted Sep 22, 2015·4 cites·2 claims
- 1481US10113061B2Polyester resin composition and moldingSUMITOMO SEIKA CHEMICALS·Filed 2015·Granted Oct 30, 2018·2 cites·3 claims
- 1579US8378033B2Process for production of water-absorbable resin particle, and water-absorbable resin particle produced by the processSUMITOMO SEIKA CHEMICALS·Filed 2007·Granted Feb 19, 2013·5 cites·8 claims
- 1678US10164244B2Negative-electrode mixture for non-aqueous electrolyte secondary cell, negative electrode for non-aqueous electrolyte secondary cell containing said mixture, non-aqueous electrolyte secondary cell provided with said negative electrode, and electrical deviceSUMITOMO SEIKA CHEMICALS·Filed 2014·Granted Dec 25, 2018·2 cites·17 claims
- 1777US12194436B2Water absorbent resin and water stop materialSUMITOMO SEIKA CHEMICALS·Filed 2020·Granted Jan 14, 2025·1 cites·3 claims
- 1877US9982069B2Water-absorbent resin and absorbent articleSUMITOMO SEIKA CHEMICALS·Filed 2014·Granted May 29, 2018·4 cites·3 claims
- 1977US5932731AProcess for preparing aromatic or heteroaromatic sulfur compoundSUMITOMO SEIKA CHEMICALS·Filed 1997·Granted Aug 3, 1999·19 cites·23 claims
- 2075US10730028B2Apparatus for producing water-absorbing resin particlesSUMITOMO SEIKA CHEMICALS·Filed 2017·Granted Aug 4, 2020·1 cites·8 claims
- 2175US10240445B2Fracturing fluid viscosity-controlling agent to be used in hydraulic fracturingSUMITOMO SEIKA CHEMICALS·Filed 2014·Granted Mar 26, 2019·2 cites·7 claims
- 2275US7829730B2Process for production of methylene disulfonate compoundSUMITOMO SEIKA CHEMICALS·Filed 2007·Granted Nov 9, 2010·3 cites·3 claims
- 2374US9862656B2Method for producing paraffinsSUMITOMO SEIKA CHEMICALS·Filed 2012·Granted Jan 9, 2018·1 cites·12 claims
- 2474US8003210B2Process for producing water-absorbing resin particles, water-absorbing resin particles made by the process, and absorbent materials and absorbent articles made by using the particlesSUMITOMO SEIKA CHEMICALS·Filed 2006·Granted Aug 23, 2011·4 cites·6 claims
- 2574US7842779B2Process for producing granular carboxylated-polymer particle and granular carboxylated-polymer particleSUMITOMO SEIKA CHEMICALS·Filed 2007·Granted Nov 30, 2010·2 cites·6 claims
- 2674US2023279256A1Resin dispersion compositionSUMITOMO SEIKA CHEMICALS·Filed 2021·Application pending·0 cites
- 2773US2023257561A1Resin dispersion compositionSUMITOMO SEIKA CHEMICALS·Filed 2021·Application pending·0 cites
- 2872US10329382B2Alkylene oxide polymer production methodSUMITOMO SEIKA CHEMICALS·Filed 2018·Granted Jun 25, 2019·0 cites·6 claims
- 2972US10066337B2Fiber treatment agent, carbon fibers treated with fiber treatment agent, and carbon fiber composite material containing said carbon fibersSUMITOMO SEIKA CHEMICALS·Filed 2014·Granted Sep 4, 2018·1 cites·15 claims
- 3071US2026058199A1Non-aqueous electrolyte for secondary battery, lithium ion battery, and lithium ion capacitorSUMITOMO SEIKA CHEMICALS·Filed 2023·Application pending·0 cites
- 3170US11465125B2Water-absorbing resinSUMITOMO SEIKA CHEMICALS·Filed 2018·Granted Oct 11, 2022·1 cites·4 claims
- 3270US6869994B1Carboxylated polymer compositionSUMITOMO SEIKA CHEMICALS·Filed 2000·Granted Mar 22, 2005·11 cites·8 claims
- 3369US10364199B2Propane production method and propane production apparatusSUMITOMO SEIKA CHEMICALS·Filed 2016·Granted Jul 30, 2019·1 cites·4 claims
- 3469US2025323274A1Lithium-ion battery electrode and lithium-ion batterySUMITOMO SEIKA CHEMICALS·Filed 2023·Application pending·0 cites
- 3569US2025337021A1Electrode for lithium ion batteries, and lithium ion batterySUMITOMO SEIKA CHEMICALS·Filed 2023·Application pending·0 cites
- 3669US2021284820A1Polyalkylene oxide compositionSUMITOMO SEIKA CHEMICALS·Filed 2021·Application pending·0 cites
- 3768US11267958B2Latex composition, shaped object obtained therefrom, and method for producing said shaped objectSUMITOMO SEIKA CHEMICALS·Filed 2018·Granted Mar 8, 2022·0 cites·7 claims
- 3867US2026061393A1Method for producing water-absorbent resin particlesSUMITOMO SEIKA CHEMICALS·Filed 2023·Application pending·0 cites
- 3966US12535185B2Corrosive-gas-mixture-filled container and corrosive gas compositionSUMITOMO SEIKA CHEMICALS·Filed 2023·Granted Jan 27, 2026·0 cites·16 claims
- 4066US12515191B2Particulate water-absorbent resin compositionSUMITOMO SEIKA CHEMICALS·Filed 2020·Granted Jan 6, 2026·0 cites·13 claims
- 4166US12116454B2Method for producing polyalkylene oxide and polyalkylene oxideSUMITOMO SEIKA CHEMICALS·Filed 2022·Granted Oct 15, 2024·0 cites·14 claims
- 4266US11978906B2Binder for secondary batterySUMITOMO SEIKA CHEMICALS·Filed 2021·Granted May 7, 2024·0 cites·10 claims
- 4366US5755856AProcess of recovering oxygen-enriched gasSUMITOMO SEIKA CHEMICALS·Filed 1996·Granted May 26, 1998·38 cites·5 claims
- 4466US2026021471A1Water-absorbing resin particles and absorbent articleSUMITOMO SEIKA CHEMICALS·Filed 2023·Application pending·0 cites
- 4565US12351692B2Absorbent resin particles and absorbentSUMITOMO SEIKA CHEMICALS·Filed 2020·Granted Jul 8, 2025·0 cites·16 claims
- 4665US10253140B2Polyrotaxane-containing compositionSUMITOMO SEIKA CHEMICALS·Filed 2014·Granted Apr 9, 2019·1 cites·3 claims
- 4765US9670292B2Apparatus for producing water-absorbent resinSUMITOMO SEIKA CHEMICALS·Filed 2014·Granted Jun 6, 2017·1 cites·12 claims
- 4865US6933356B2Particles of carboxylated polymerSUMITOMO SEIKA CHEMICALS·Filed 2002·Granted Aug 23, 2005·7 cites·5 claims
- 4965US5856520ASubstituted benzenedithiol metal complexSUMITOMO SEIKA CHEMICALS·Filed 1997·Granted Jan 5, 1999·8 cites·16 claims
- 5065US2025222433A1Method for producing water-absorbing resin compositionSUMITOMO SEIKA CHEMICALS·Filed 2023·Application pending·0 cites
Showing the top 50 of 389 patent records by PatentIndex Score.
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