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Expired European patentEurope

Organophilic polyphenolic acid adducts

EP 0274523 B1 · Applicant: VENTURE CHEMICALS, 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 July 13, 1987 and granted October 14, 1992. A European patent lasts at most 20 years from filing, so its term ended July 13, 2007.
  • 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 January 13, 2013.
  • 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.
FiledJuly 13, 1987
PublishedJuly 20, 1988
GrantedOctober 14, 1992
Term endedJuly 13, 2007
Application numberEP 87905059
Classification (CPC)C08H6/00 +2 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedJuly 13, 1987PublishedJuly 20, 1988Patent grantedOct 14, 1992Term endedJuly 13, 2007

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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