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Expired European patentEurope

Continuous method for preparing high cis-1,4 polybutadiene

EP 0170774 B1 · Applicant: THE FIRESTONE TIRE & RUBBER COMPANY

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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 March 27, 1985 and granted January 25, 1989. A European patent lasts at most 20 years from filing, so its term ended March 27, 2005.
  • 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 September 27, 2010.
  • 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.
FiledMarch 27, 1985
PublishedFebruary 12, 1986
GrantedJanuary 25, 1989
Term endedMarch 27, 2005
Application numberEP 85103708
Classification (CPC)C08F136/06

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedMarch 27, 1985PublishedFeb 12, 1986Patent grantedJan 25, 1989Term endedMarch 27, 2005

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.