Expired European patentEurope
Method for preparing color-free, stabilized polymers of conjugated dienes or vinyl aromatic hydrocarbons or copolymers of conjugated dienes and vinyl aromatic hydrocarbons
EP 0090163 B1 · Applicant: THE FIRESTONE TIRE & RUBBER COMPANY
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 February 14, 1983 and granted May 13, 1987. A European patent lasts at most 20 years from filing, so its term ended February 14, 2003.
- 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 14, 2008.
- 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 14, 1983
PublishedOctober 5, 1983
GrantedMay 13, 1987
Term endedFebruary 14, 2003
Application numberEP 83101412
Classification (CPC)C08C2/00
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.