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Expired European patentEurope

Method for making organopolysiloxanes with at least one Si-bound cyclopentadienyl-group

EP 0514737 B1 · Applicant: Th. Goldschmidt AG

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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 May 12, 1992 and granted February 28, 1996. A European patent lasts at most 20 years from filing, so its term ended May 12, 2012.
  • 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 November 12, 2017.
  • 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.
FiledMay 12, 1992
PublishedNovember 25, 1992
GrantedFebruary 28, 1996
Term endedMay 12, 2012
Application numberEP 92107941
Classification (CPC)C08G77/38 +2 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedMay 12, 1992PublishedNov 25, 1992Patent grantedFeb 28, 1996Term endedMay 12, 2012

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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