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Expired European patentEurope

Process for producing polycarbonate

EP 1719791 B1 · Applicant: IDEMITSU KOSAN CO., LTD.

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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 February 22, 2005 and granted January 13, 2010. A European patent lasts at most 20 years from filing, so its term ended February 22, 2025.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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.
FiledFebruary 22, 2005
PublishedNovember 8, 2006
GrantedJanuary 13, 2010
Term endedFebruary 22, 2025
Application numberEP 05710504
Classification (CPC)C08G64/205 +1 more

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedFeb 22, 2005PublishedNov 8, 2006Patent grantedJan 13, 2010Term endedFeb 22, 2025

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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