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Expired European patentEurope

A data output stage of the buffer type, having reduced noise to ground, for logic circuits of the CMOS type

EP 0455002 B1 · Applicant: SGS-THOMSON MICROELECTRONICS S.r.l.

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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 April 4, 1991 and granted December 29, 1997. A European patent lasts at most 20 years from filing, so its term ended April 4, 2011.
  • 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 October 4, 2016.
  • 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.
FiledApril 4, 1991
PublishedNovember 6, 1991
GrantedDecember 29, 1997
Term endedApril 4, 2011
Application numberEP 91105323
Classification (CPC)H03K19/00361

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedApril 4, 1991PublishedNov 6, 1991Patent grantedDec 29, 1997Term endedApril 4, 2011

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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