Expired European patentEurope
"Unknown" response processing in a diagnostic expert system
EP 0397992 B1 · Applicant: Bull HN Information Systems Inc.
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.
Why it's free to use
- Filed March 21, 1990 and granted November 8, 1995. 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
GrantedNovember 8, 1995
Term endedMarch 21, 2010
Application numberEP 90105344
Classification (CPC)G06N5/04 +1 more
Timeline
Timeline From EPO dates
Sources & verification
Official EPO records
Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.