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Expired European patentEurope

A method for detecting an irregular state in a non-invasive pulse oximeter system

EP 0658331 B1 · Applicant: Hewlett-Packard GmbH

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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 December 11, 1993 and granted October 2, 1996. A European patent lasts at most 20 years from filing, so its term ended December 11, 2013.
  • 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 June 11, 2019.
  • 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.
FiledDecember 11, 1993
PublishedJune 21, 1995
GrantedOctober 2, 1996
Term endedDecember 11, 2013
Application numberEP 93120013
Classification (CPC)A61B5/6838 +2 more

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedDec 11, 1993PublishedJune 21, 1995Patent grantedOct 2, 1996Term endedDec 11, 2013

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

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