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Expired European patentEurope

Process for the production of polycarbonate

EP 0764673 B1 · Applicant: TEIJIN LIMITED

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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 September 18, 1996 and granted November 17, 1999. A European patent lasts at most 20 years from filing, so its term ended September 18, 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 March 18, 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.
FiledSeptember 18, 1996
PublishedMarch 26, 1997
GrantedNovember 17, 1999
Term endedSeptember 18, 2016
Application numberEP 96306795
Classification (CPC)C08G64/307 +1 more

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedSep 18, 1996PublishedMarch 26, 1997Patent grantedNov 17, 1999Term endedSep 18, 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

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