Inventor · disambiguated record
Katsumasa Yamamoto
Also filed as: YAMAMOTO KATSUMASA
17 granted patents·7 pending applications·155 citations·filing 1986–2020
91Inventor score
Files withSUMITOMO SEIKA CHEMICALS15TOYO BOSEKI6MASUHARA YUSAKU1SUMITOMO SEIKA CHEMICHALS CO LTD1YAMAMOTO KATSUMASA1
Top patents by PatentIndex Score
24 records- 0194US4957980APolyester resin composition and hollow molded article thereofTOYO BOSEKI·Filed 1988·Granted Sep 18, 1990·67 cites·1 claims
- 0280US5124736AProcess and apparatus for developing photopolymer platesTOYO BOSEKI·Filed 1990·Granted Jun 23, 1992·40 cites·6 claims
- 0366US2020115554A1Epoxy resin composition, method for producing same, and use of compositionSUMITOMO SEIKA CHEMICHALS CO LTD·Filed 2019·Application pending·0 cites
- 0464US5145946AProcess for preparing polyarylene sulfide with alkali metal salt of phenolic aromatic carboxylic acidTOYO BOSEKI·Filed 1987·Granted Sep 8, 1992·15 cites·8 claims
- 0563US5834621ANovel sulfur-containing compound and method for preparing the sameSUMITOMO SEIKA CHEMICALS·Filed 1996·Granted Nov 10, 1998·9 cites·19 claims
- 0662US11111382B2Epoxy resin compositionSUMITOMO SEIKA CHEMICALS·Filed 2018·Granted Sep 7, 2021·1 cites·15 claims
- 0762US9181400B2Silicone resin composition, cured silicone resin, and sealed optical semiconductor elementSUMITOMO SEIKA CHEMICALS·Filed 2013·Granted Nov 10, 2015·2 cites·6 claims
- 0855US11066510B2Epoxy resin composition, process for producing same, and uses of said compositionSUMITOMO SEIKA CHEMICALS·Filed 2020·Granted Jul 20, 2021·0 cites·8 claims
- 0953US4663431AProcess for preparing polyarylene sulfide with alkali metal salt of phenolic aromatic sulfonic acidTOYO BOSEKI·Filed 1986·Granted May 5, 1987·11 cites·7 claims
- 1049US9963552B2Condensation-curable silicone resin composition, condensation-curable silicone resin cured product, and sealed optical semiconductor elementSUMITOMO SEIKA CHEMICALS·Filed 2014·Granted May 8, 2018·0 cites·4 claims
- 1148US2022106420A1Curable resin composition and cured product thereofSUMITOMO SEIKA CHEMICALS·Filed 2020·Application pending·0 cites
- 1247US2022267653A1Adhesive compositionSUMITOMO SEIKA CHEMICALS·Filed 2020·Application pending·0 cites
- 1346US6348300B1Process for treating periphery of unexposed photosensitive resin plateTOYO BOSEKI·Filed 2000·Granted Feb 19, 2002·2 cites·6 claims
- 1443US2018327595A1Epoxy resin composition, method for producing same, and use of compositionSUMITOMO SEIKA CHEMICALS·Filed 2016·Application pending·0 cites
- 1542US8216768B2Photoacid generator and photoreactive compositionYAMAMOTO KATSUMASA·Filed 2008·Granted Jul 10, 2012·2 cites·9 claims
- 1642US2022243001A1Epoxy resin compositionSUMITOMO SEIKA CHEMICALS·Filed 2020·Application pending·0 cites
- 1742US2019119434A1Epoxy resin composition, process for producing same, and uses of said compositionSUMITOMO SEIKA CHEMICALS·Filed 2016·Application pending·0 cites
- 1840US9783717B2Addition-curable silicone resin composition, addition-curable silicone resin cured product, and sealed optical semiconductor elementSUMITOMO SEIKA CHEMICALS·Filed 2014·Granted Oct 10, 2017·0 cites·7 claims
- 1940US6150076AProcess for treating periphery of unexposed photosensitive resin plateTOYO BOSEKI·Filed 1992·Granted Nov 21, 2000·6 cites·9 claims
- 2034US11603466B2Epoxy resin compositionSUMITOMO SEIKA CHEMICALS·Filed 2018·Granted Mar 14, 2023·0 cites·7 claims
- 2134US11292872B2Epoxy resin compositionSUMITOMO SEIKA CHEMICALS·Filed 2018·Granted Apr 5, 2022·0 cites·12 claims
- 2234US11091627B2Epoxy resin compositionSUMITOMO SEIKA CHEMICALS·Filed 2018·Granted Aug 17, 2021·0 cites·13 claims
- 2334US2020385514A1Epoxy resin compositionSUMITOMO SEIKA CHEMICALS·Filed 2018·Application pending·0 cites
- 2431US8540904B2Composition for ultraviolet absorbent substance and ultraviolet absorbent substance comprising sameMASUHARA YUSAKU·Filed 2010·Granted Sep 24, 2013·0 cites·18 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →