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Expired European patentEurope

Process for the preparation of polyglycidyl ethers of polyphenols

EP 0013532 B1 · Applicant: RHONE-POULENC CHIMIE DE BASE

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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 December 20, 1979 and granted October 27, 1982. A European patent lasts at most 20 years from filing, so its term ended December 20, 1999.
  • 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 June 20, 2005.
  • 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.
FiledDecember 20, 1979
PublishedJuly 23, 1980
GrantedOctober 27, 1982
Term endedDecember 20, 1999
Application numberEP 79420071
Classification (CPC)C08G59/063

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedDec 20, 1979PublishedJuly 23, 1980Patent grantedOct 27, 1982Term endedDec 20, 1999

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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