Expired European patentEurope
Copolymers of poly(vinyl trifluoroacetate) or poly(vinyl alcohol), process for preparing poly(vinyl alcohol) copolymers and process for preparing shaped articles from such copolymers.
EP 0128004 B1 · Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY
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 May 30, 1984 and granted December 19, 1990. A European patent lasts at most 20 years from filing, so its term ended May 30, 2004.
- 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 November 30, 2009.
- 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.
FiledMay 30, 1984
PublishedDecember 12, 1984
GrantedDecember 19, 1990
Term endedMay 30, 2004
Application numberEP 84303635
Classification (CPC)C08F8/44 +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.