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Expired European patentEurope

Key switch mechanism with membrane actuator

EP 0395561 B1 · Applicant: LEXMARK INTERNATIONAL, INC.

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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 27, 1990 and granted June 28, 1995. A European patent lasts at most 20 years from filing, so its term ended March 27, 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 27, 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 27, 1990
PublishedOctober 31, 1990
GrantedJune 28, 1995
Term endedMarch 27, 2010
Application numberEP 90480052
Classification (CPC)H01H13/705

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedMarch 27, 1990PublishedOct 31, 1990Patent grantedJune 28, 1995Term endedMarch 27, 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

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