IP Verse

Idemitsu Kosan Co., Ltd. competitive analysis

Latest patents of Idemitsu Kosan Co., Ltd. opposed by its competitors

Explore Idemitsu Kosan Co., Ltd.'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: Oct 22, 2026
Patent NumberPublication DateTitleTotal Oppositions
EP3699259
Dec 31, 2025Hydraulic Oil Composition1
EP3693447
Jun 25, 2025Gear Oil Composition For Automobile, And Lubrication Method1
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
EP1876000
Apr 15, 2020Method Of Granulating Flexible Polyolefin Resin And Granule1
EP3109299
Jun 12, 2019Lubricating Oil Composition1
EP2261302
May 8, 2019Organic Electroluminescence Device And Anthracene Derivative1

Latest PTAB cases involving Idemitsu Kosan Co., Ltd.

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

Last updated on: Oct 22, 2026
Proceeding NumberFiling DatePetitionerRespondentStatus

Get alerts for PTAB Cases involving Idemitsu Kosan Co., Ltd.

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 Co., Ltd. with top 3 competitors. Includes complete PTAB case data and opposition data from 2018 onwards.

Last updated on: Oct 22, 2026
CompanyOppositions FiledOppositions FacedPTAB Cases FiledPTAB Cases Faced
IDEMITSU KOSAN - 22 - 5
AFTON CHEMICAL4741 -
BASF341399714
DUK SAN NEOLUX - 22 -