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Expired European patentEurope

Read-out amplifier for photovoltaic detector

EP 0331695 B1 · Applicant: Santa Barbara Research Center

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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.

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Why it's free to use

  • Filed August 15, 1988 and granted November 4, 1992. A European patent lasts at most 20 years from filing, so its term ended August 15, 2008.
  • 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 February 15, 2014.
  • 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.
FiledAugust 15, 1988
PublishedSeptember 13, 1989
GrantedNovember 4, 1992
Term endedAugust 15, 2008
Application numberEP 88907520
Classification (CPC)H03F3/082

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedAug 15, 1988PublishedSep 13, 1989Patent grantedNov 4, 1992Term endedAug 15, 2008

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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