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Expired European patentEurope

Circuit for the voltage protection of the supply voltage of a CMOS integrated circuit

EP 0538239 B1 · Applicant: AUSTRIA MIKRO SYSTEME INTERNATIONAL AKTIENGESELLSCHAFT

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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 16, 1992 and granted December 18, 1996. A European patent lasts at most 20 years from filing, so its term ended October 16, 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 16, 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 16, 1992
PublishedApril 21, 1993
GrantedDecember 18, 1996
Term endedOctober 16, 2012
Application numberEP 92890225
Classification (CPC)H10D89/601

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedOct 16, 1992PublishedApril 21, 1993Patent grantedDec 18, 1996Term endedOct 16, 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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