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Expired European patentEurope

Identification card

EP 0011684 B1 · Applicant: HOECHST AKTIENGESELLSCHAFT

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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 August 29, 1979 and granted February 9, 1983. A European patent lasts at most 20 years from filing, so its term ended August 29, 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 March 1, 2005.
  • 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.
FiledAugust 29, 1979
PublishedJune 11, 1980
GrantedFebruary 9, 1983
Term endedAugust 29, 1999
Application numberEP 79103186
Classification (CPC)B42D25/00 +1 more

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedAug 29, 1979PublishedJune 11, 1980Patent grantedFeb 9, 1983Term endedAug 29, 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.