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Expired European patentEurope

Polymerization of hexafluoropropylene oxide

EP 1858952 B1 · Applicant: 3M Innovative Properties 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 February 28, 2006 and granted August 27, 2008. A European patent lasts at most 20 years from filing, so its term ended February 28, 2026.
  • 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 28, 2006
PublishedNovember 28, 2007
GrantedAugust 27, 2008
Term endedFebruary 28, 2026
Application numberEP 06736240
Classification (CPC)C08G65/226

Timeline

Timeline From EPO dates

2007200920112013201520172019202120232025Application filedFeb 28, 2006PublishedNov 28, 2007Patent grantedAug 27, 2008Term endedFeb 28, 2026

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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