Expired European patentEurope
Process for the preparation of polyphenol derivatives, derivatives obtained by this process, their use in the preparation of polymers and copolymers, and the copolymers thus obtained
EP 0088027 B1 · Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE Etablissement de Caractère Scientifique Technique et Industriel
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.
Why it's free to use
- Filed March 2, 1983 and granted March 12, 1986. A European patent lasts at most 20 years from filing, so its term ended March 2, 2003.
- 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 September 2, 2008.
- 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.
FiledMarch 2, 1983
PublishedSeptember 7, 1983
GrantedMarch 12, 1986
Term endedMarch 2, 2003
Application numberEP 83400429
Classification (CPC)C07C317/00 +2 more
Timeline
Timeline From EPO dates
Sources & verification
Official EPO records
Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.