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European application, no grantEurope

Cycloheptatriene derivatives and process for their preparation

EP 0011670 A2 · Applicant: BAYER AG

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 April 30, 1979 and never granted as a European patent. Had it been granted, its 20-year term would have ended April 30, 1999.
  • 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 October 30, 2004.
  • 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.
FiledApril 30, 1979
PublishedJune 11, 1980
GrantedNever granted
Term endedApril 30, 1999
Application numberEP 79101296
Classification (CPC)C07C275/26 +2 more

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedApril 30, 1979PublishedJune 11, 1980Term endedApril 30, 1999

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.