Expired European patentEurope
Silicone polyether copolymers, processes for preparing the same, compositions for treating textile materials and the coated textile materials, thus treated
EP 0028357 B1 · Applicant: SWS Silicones Corporation
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 October 22, 1980 and granted September 21, 1983. A European patent lasts at most 20 years from filing, so its term ended October 22, 2000.
- 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 April 22, 2006.
- 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.
FiledOctober 22, 1980
PublishedMay 13, 1981
GrantedSeptember 21, 1983
Term endedOctober 22, 2000
Application numberEP 80106439
Classification (CPC)C07F7/0838 +2 more
Sources & verification
Official EPO records
Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.