Patent Yard Sign in
Expired European patentEurope

Friction modifier comprising metal sulfonate and lubricating oil composition containing the same

EP 0881277 B1 · Applicant: TONEN CORPORATION

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

Read the whole patent

Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

Google PatentsEPO PDF

Why it's free to use

  • Filed May 29, 1998 and granted August 17, 2005. A European patent lasts at most 20 years from filing, so its term ended May 29, 2018.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by November 29, 2023.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledMay 29, 1998
PublishedDecember 2, 1998
GrantedAugust 17, 2005
Term endedMay 29, 2018
Application numberEP 98304251
Classification (CPC)C10M135/10 +1 more

Timeline

Timeline From EPO dates

1999200120032005200720092011201320152017Application filedMay 29, 1998PublishedDec 2, 1998Patent grantedAug 17, 2005Term endedMay 29, 2018

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.