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Expired European patentEurope

Metal working using lubricants containing basic alkaline earth metal salts

EP 0235282 B1 · Applicant: The Lubrizol Corporation

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Overview

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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.

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Why it's free to use

  • Filed September 16, 1986 and granted November 21, 1991. A European patent lasts at most 20 years from filing, so its term ended September 16, 2006.
  • 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 March 16, 2012.
  • 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.
FiledSeptember 16, 1986
PublishedSeptember 9, 1987
GrantedNovember 21, 1991
Term endedSeptember 16, 2006
Application numberEP 86906092
Classification (CPC)C10M163/00 +2 more

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedSep 16, 1986PublishedSep 9, 1987Patent grantedNov 21, 1991Term endedSep 16, 2006

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

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