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Expired European patentEurope

Process for the preparation of elastomeric materials on the basis of polynorbornene, and products obtained by this process

EP 0046095 B1 · Applicant: Société Chimique des Charbonnages

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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.

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Why it's free to use

  • Filed July 20, 1981 and granted October 26, 1983. A European patent lasts at most 20 years from filing, so its term ended July 20, 2001.
  • 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 January 20, 2007.
  • 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.
FiledJuly 20, 1981
PublishedFebruary 17, 1982
GrantedOctober 26, 1983
Term endedJuly 20, 2001
Application numberEP 81401140
Classification (CPC)C08G18/00 +1 more

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedJuly 20, 1981PublishedFeb 17, 1982Patent grantedOct 26, 1983Term endedJuly 20, 2001

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.