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Expired European patentEurope

Manufacturing process for high cis poly(butadiene)

EP 0770631 B1 · Applicant: THE DOW CHEMICAL 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 October 16, 1996 and granted June 21, 2000. A European patent lasts at most 20 years from filing, so its term ended October 16, 2016.
  • 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 April 16, 2022.
  • 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.
FiledOctober 16, 1996
PublishedMay 2, 1997
GrantedJune 21, 2000
Term endedOctober 16, 2016
Application numberEP 96202878
Classification (CPC)C08F136/06

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedOct 16, 1996PublishedMay 2, 1997Patent grantedJune 21, 2000Term endedOct 16, 2016

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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