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Expired European patentEurope

Circuit for supplying an electrical load, especially for discharge lamp

EP 0032089 B1 · Applicant: ELAM LIMITED Société dite

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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 December 19, 1980 and granted November 28, 1984. A European patent lasts at most 20 years from filing, so its term ended December 19, 2000.
  • 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 June 19, 2006.
  • 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.
FiledDecember 19, 1980
PublishedJuly 15, 1981
GrantedNovember 28, 1984
Term endedDecember 19, 2000
Application numberEP 80401830
Classification (CPC)H05B41/392

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedDec 19, 1980PublishedJuly 15, 1981Patent grantedNov 28, 1984Term endedDec 19, 2000

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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