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Expired European patentEurope

Process for removing and regenerating a double metal cyanide (dmc) catalyst from a polymer polyol

EP 1594909 B1 · Applicant: BASF Aktiengesellschaft

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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 17, 2003 and granted March 28, 2007. A European patent lasts at most 20 years from filing, so its term ended October 17, 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.
FiledOctober 17, 2003
PublishedNovember 16, 2005
GrantedMarch 28, 2007
Term endedOctober 17, 2023
Application numberEP 03772231
Classification (CPC)C08G65/32 +2 more

Timeline

Timeline From EPO dates

2004200620082010201220142016201820202022Application filedOct 17, 2003PublishedNov 16, 2005Patent grantedMarch 28, 2007Term endedOct 17, 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

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