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Expired European patentEurope

1-substituted conjugated alka-(E,Z)-diene compounds and a method for the preparation thereof

EP 0241335 B1 · Applicant: Shin-Etsu Chemical Co., Ltd.

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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 17, 1987 and granted June 3, 1992. A European patent lasts at most 20 years from filing, so its term ended March 17, 2007.
  • 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 September 17, 2012.
  • 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 17, 1987
PublishedOctober 14, 1987
GrantedJune 3, 1992
Term endedMarch 17, 2007
Application numberEP 87400592
Classification (CPC)C07C21/19 +1 more

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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

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