Expired European patentEurope
Heat-hardenable compositions based on polyglycidyl ethers and polyhydric phenols, halogenated tetraphenols, polyglycidyl ethers and process for preparing tetraphenols
EP 0304125 B1 · Applicant: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.
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 August 11, 1988 and granted March 23, 1994. A European patent lasts at most 20 years from filing, so its term ended August 11, 2008.
- 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 February 11, 2014.
- 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.
FiledAugust 11, 1988
PublishedFebruary 22, 1989
GrantedMarch 23, 1994
Term endedAugust 11, 2008
Application numberEP 88201727
Classification (CPC)C08G59/32 +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.