Inventor · disambiguated record
Seishi Yoshikawa
Also filed as: YOSHIKAWA SEISHI
14 granted patents·15 pending applications·95 citations·filing 2007–2025
89Inventor score
Files withTOYO SEIKAN GROUP HOLDINGS LTD22TOYO SEIKAN KAISHA LTD3YOSHIKAWA SEISHI3TOYO SEIKAN CO LTD1
Top patents by PatentIndex Score
29 records- 0195US9284432B2Method for degrading a readily-degradable resin compositionTOYO SEIKAN KAISHA LTD·Filed 2014·Granted Mar 15, 2016·27 cites·5 claims
- 0295US8846355B2Method for degrading biodegradable resinTOYO SEIKAN KAISHA LTD·Filed 2013·Granted Sep 30, 2014·30 cites·7 claims
- 0391US8501445B2Method for producing oligomer and/or monomer by degrading biodegradable resinYOSHIKAWA SEISHI·Filed 2009·Granted Aug 6, 2013·28 cites·8 claims
- 0486US11148402B2Heat-resistant multilayer container and method for producing the sameTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2019·Granted Oct 19, 2021·3 cites·8 claims
- 0582US10246625B2Dispersion solution for drilling and method of extraction using the dispersion solutionTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2016·Granted Apr 2, 2019·2 cites·3 claims
- 0679US8048502B2Readily degradable resin composition and biodegradable container using the sameTOYO SEIKAN KAISHA LTD·Filed 2007·Granted Nov 1, 2011·4 cites·13 claims
- 0775US2022033572A1Polyoxalate copolymer and method of producing the sameTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2021·Application pending·0 cites
- 0870US10487620B2Method of extracting underground resources and hydrolysis-blocking agent for use in the methodTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2015·Granted Nov 26, 2019·1 cites·15 claims
- 0968US12221532B2Propylene-based resin composition and film for heat sealingTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2020·Granted Feb 11, 2025·0 cites·8 claims
- 1067US2025387963A1Sealant filmTOYO SEIKAN CO LTD·Filed 2025·Application pending·0 cites
- 1163US12084541B2Polylactic acid solid composition and method for producing the sameTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2020·Granted Sep 10, 2024·0 cites·2 claims
- 1262US2024326395A1LaminateTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2024·Application pending·0 cites
- 1360US2019055348A1Polyoxalate copolymer and method of producing the sameTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2017·Application pending·0 cites
- 1459US12486090B2Layered body for packagingTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2021·Granted Dec 2, 2025·0 cites·15 claims
- 1559US10385171B2Powder comprising hydrolyzable resin particlesTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2015·Granted Aug 20, 2019·0 cites·6 claims
- 1655US2015315891A1Dispersion solution for drilling and method of extraction using the dispersion solutionTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2013·Application pending·0 cites
- 1754US2021269587A1Polylactic acid copolymer and method of producing the sameTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2019·Application pending·0 cites
- 1853US2016208062A1Biodegradable resin composition having a porous structure and method for surface treatment of sameTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2014·Application pending·0 cites
- 1951US2017002135A1Polyoxalates and a process for the production thereofTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2014·Application pending·0 cites
- 2050US2024009976A1Packaging bag and packaging multilayer film to be used for producing the packaging bagTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2021·Application pending·0 cites
- 2147US10040983B2Dispersion solution for drilling and method of extracting underground resources using the dispersion solutionTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2013·Granted Aug 7, 2018·0 cites·6 claims
- 2245US10626246B2Polylactic acid compositionTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2015·Granted Apr 21, 2020·0 cites·9 claims
- 2343US11104840B2Method of extracting underground resources by using hydrolysable particlesTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2016·Granted Aug 31, 2021·0 cites·2 claims
- 2443US2022213316A1Organic solvent dispersion of hydrolysable polymerTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2020·Application pending·0 cites
- 2543US2013184415A1Biodegradable resin compositionYOSHIKAWA SEISHI·Filed 2011·Application pending·0 cites
- 2641US2017210873A1Method of decomposing ester resinsTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2015·Application pending·0 cites
- 2740US2013274373A1Biodegradable resin compositionYOSHIKAWA SEISHI·Filed 2012·Application pending·0 cites
- 2839US2017342206A1Polyoxalate copolymerTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2015·Application pending·0 cites
- 2938US2017015888A1Formed body of resin to be thrown into waterTOYO SEIKAN GROUP HOLDINGS LTD·Filed 2015·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →