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Expired European patentEurope

Process for the preparation of alpha,alpha-difluoroalkoxy or alpha,alpha-difluoroalkylthiophenyl ketones

EP 0085265 B1 · Applicant: RHONE-POULENC SPECIALITES CHIMIQUES

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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 30, 1982 and granted May 22, 1985. A European patent lasts at most 20 years from filing, so its term ended June 30, 2002.
  • 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 30, 2007.
  • 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 30, 1982
PublishedAugust 10, 1983
GrantedMay 22, 1985
Term endedJune 30, 2002
Application numberEP 82401214
Classification (CPC)C07C49/84 +2 more

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedJune 30, 1982PublishedAug 10, 1983Patent grantedMay 22, 1985Term endedJune 30, 2002

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.