Expired European patentEurope
Process for the condensation of at least one epoxide on at least one cyclic anhyhride in the presence of a titanium-based catalyst
EP 0377357 B1 · Applicant: L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
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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 December 4, 1989 and granted March 23, 1994. A European patent lasts at most 20 years from filing, so its term ended December 4, 2009.
- 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 4, 2015.
- 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 4, 1989
PublishedJuly 11, 1990
GrantedMarch 23, 1994
Term endedDecember 4, 2009
Application numberEP 89403349
Classification (CPC)C08G63/42 +1 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.