Expired European patentEurope
A keyring methaphor for users' security keys on a distributed multiprocess data system
EP 0501475 B1 · Applicant: Bull HN Information Systems Inc.
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.
Why it's free to use
- Filed February 27, 1992 and granted August 11, 1999. A European patent lasts at most 20 years from filing, so its term ended February 27, 2012.
- 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 August 27, 2017.
- 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.
FiledFebruary 27, 1992
PublishedSeptember 2, 1992
GrantedAugust 11, 1999
Term endedFebruary 27, 2012
Application numberEP 92103363
Classification (CPC)G07F7/1016 +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.