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Expired European patentEurope

Process for the preparation of thermoplastic foams using combination blowing agent

EP 0201625 B1 · Applicant: THE DOW CHEMICAL COMPANY

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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 13, 1985 and granted March 13, 1991. A European patent lasts at most 20 years from filing, so its term ended September 13, 2005.
  • 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 13, 2011.
  • 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 13, 1985
PublishedNovember 20, 1986
GrantedMarch 13, 1991
Term endedSeptember 13, 2005
Application numberEP 85111596
Classification (CPC)C08J9/0061 +2 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedSep 13, 1985PublishedNov 20, 1986Patent grantedMarch 13, 1991Term endedSep 13, 2005

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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