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European application, no grantEurope

Phenolic derivatives of 2,5-dimercapto-1,3,4-thiadiazole and their use as lubricant additives

EP 0524452 A1 · Applicant: R.T. VANDERBILT COMPANY, Inc.

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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 June 27, 1992 and never granted as a European patent. Had it been granted, its 20-year term would have ended June 27, 2012.
  • 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 December 27, 2017.
  • 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.
FiledJune 27, 1992
PublishedJanuary 27, 1993
GrantedNever granted
Term endedJune 27, 2012
Application numberEP 92110927
Classification (CPC)C10M135/36 +1 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedJune 27, 1992PublishedJan 27, 1993Term endedJune 27, 2012

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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