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Expired European patentEurope

Process for polymerising conjugate diolefins, and means suitable for this purpose

EP 0092271 B1 · Applicant: ENICHEM POLIMERI S.p.A.

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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.

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Why it's free to use

  • Filed April 11, 1983 and granted August 13, 1986. A European patent lasts at most 20 years from filing, so its term ended April 11, 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 October 11, 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.
FiledApril 11, 1983
PublishedOctober 26, 1983
GrantedAugust 13, 1986
Term endedApril 11, 2003
Application numberEP 83200505
Classification (CPC)C08F36/04

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedApril 11, 1983PublishedOct 26, 1983Patent grantedAug 13, 1986Term endedApril 11, 2003

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

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