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Expired European patentEurope

"C" program block annotator

EP 0397991 B1 · Applicant: Bull HN Information Systems Inc.

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Overview

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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 21, 1990 and granted September 11, 1996. A European patent lasts at most 20 years from filing, so its term ended March 21, 2010.
  • 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 21, 2015.
  • 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 21, 1990
PublishedNovember 22, 1990
GrantedSeptember 11, 1996
Term endedMarch 21, 2010
Application numberEP 90105343
Classification (CPC)G06F8/75

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedMarch 21, 1990PublishedNov 22, 1990Patent grantedSep 11, 1996Term endedMarch 21, 2010

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.