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European application, no grantEurope

Octahydro-4a,7-ethano- and -etheno-benzofuro[3,2-e]isoquinoline-4one derivatives

EP 0164136 A1 · Applicant: E.I. DU PONT DE NEMOURS AND COMPANY

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Overview

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

Read the whole patent

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 June 29, 1982 and never granted as a European patent. Had it been granted, its 20-year term would have ended June 29, 2002.
  • 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 December 29, 2007.
  • 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.
FiledJune 29, 1982
PublishedDecember 11, 1985
GrantedNever granted
Term endedJune 29, 2002
Application numberEP 85107367
Classification (CPC)C07D491/10

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedJune 29, 1982PublishedDec 11, 1985Term endedJune 29, 2002

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.