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IP Verse

Idemitsu Kosan competitive analysis

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Latest patents of Idemitsu Kosan opposed by its competitors

Explore Idemitsu Kosan's recently opposed patents, revealing key competitive challenges and strategic patent disputes in the industry. Track oppositions filed by competitors to understand technology battlegrounds and assess potential risks.

Last updated on: Nov 13, 2025
Patent NumberPublication DateTitleTotal Oppositions
EP3211038
Feb 12, 2025Polycarbonate Resin Composition Including Polycarbonate-Polyorganosiloxane Copolymer, And Molded Article Of Same1
EP2987829
Jul 17, 2024Polycarbonate-Type Resin Composition And Molded Article1
EP3275978
May 8, 2024Lubricant Composition For Gasoline Engines And Method For Producing Same1
EP3950905
Jan 17, 2024Lubricating Oil Composition1
EP2578636
Jun 22, 2022Polycarbonate Resin Composition And Molded Polycarbonate Resin1
EP3279298
Mar 16, 2022Lubricating Oil Composition And Method For Reducing Friction In Internal Combustion Engines1
EP3070126
May 6, 2020Aromatic Polycarbonate Resin Molding1
EP3109299
Jun 12, 2019Lubricating Oil Composition1
EP2871200
Jan 30, 2019Polycarbonate-Polyorganosiloxane Copolymer And Method For Continuously Producing Same1
EP2826846
Dec 5, 2018Lubricant Composition1

Latest PTAB cases involving Idemitsu Kosan

Discover the latest PTAB cases involving Idemitsu Kosan, highlighting their recent legal challenges and patent disputes.

Last updated on: Nov 16, 2025
Proceeding NumberFiling DatePetitionerRespondentStatus

Get alerts for PTAB Cases involving Idemitsu Kosan

IPR2017-00197Nov 2, 2016DUK SAN NEOLUXIDEMITSU KOSANInstitution Denied
IPR2016-00148Nov 4, 2015DUK SAN NEOLUXIDEMITSU KOSANFinal Written Decision
IPR2015-00796Feb 23, 2015ROHM AND HAAS ELECTRONIC MATERIALS KOREAIDEMITSU KOSANInstitution Denied
IPR2015-00797Feb 23, 2015ROHM AND HAAS ELECTRONIC MATERIALS KOREAIDEMITSU KOSANInstitution Denied
IPR2015-00564Jan 14, 2015SFCIDEMITSU KOSANFinal Written Decision

Peer Comparison New

IP litigation analysis comparing Idemitsu Kosan with top 3 competitors. Includes complete PTAB case data and opposition data from 2018 onwards.

Last updated on: Nov 13, 2025
CompanyOppositions FiledOppositions FacedPTAB Cases FiledPTAB Cases Faced
IDEMITSU KOSAN - 13 - 5
AFTON CHEMICAL3141 -
DUK SAN NEOLUX - - 2 -
ROHM AND HAAS ELECTRONIC MATERIALS KOREA - 12 -