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Expired European patentEurope

Circuit for generating a programming voltage for a programmable read-only memory, especially of an EPROM type, and method and memory relating to it

EP 0538121 B1 · Applicant: SGS-THOMSON MICROELECTRONICS S.A.

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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 October 14, 1992 and granted April 16, 1997. A European patent lasts at most 20 years from filing, so its term ended October 14, 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 April 14, 2018.
  • 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.
FiledOctober 14, 1992
PublishedApril 21, 1993
GrantedApril 16, 1997
Term endedOctober 14, 2012
Application numberEP 92402805
Classification (CPC)G11C16/30

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedOct 14, 1992PublishedApril 21, 1993Patent grantedApril 16, 1997Term endedOct 14, 2012

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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