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Expired European patentEurope

Method of preparing polyestercarbonates

EP 1504048 B1 · Applicant: GENERAL ELECTRIC COMPANY

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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 20, 2003 and granted November 21, 2007. A European patent lasts at most 20 years from filing, so its term ended March 20, 2023.
  • 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.
FiledMarch 20, 2003
PublishedFebruary 9, 2005
GrantedNovember 21, 2007
Term endedMarch 20, 2023
Application numberEP 03716711
Classification (CPC)C08G63/64

Timeline

Timeline From EPO dates

2004200620082010201220142016201820202022Application filedMarch 20, 2003PublishedFeb 9, 2005Patent grantedNov 21, 2007Term endedMarch 20, 2023

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.