Expired European patentEurope
Block copolymers of diene having their terminal end blocks of a random copolymer of styrene or alkylstyrene and an alpha-methylstyrene, and their preparation
EP 0014947 B1 · Applicant: THE DOW CHEMICAL 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 February 13, 1980 and granted September 18, 1985. A European patent lasts at most 20 years from filing, so its term ended February 13, 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 August 13, 2005.
- 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.
FiledFebruary 13, 1980
PublishedSeptember 3, 1980
GrantedSeptember 18, 1985
Term endedFebruary 13, 2000
Application numberEP 80100713
Classification (CPC)C08F297/04
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.