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Expired European patentEurope

Method and apparatus for controlling illumination from gas discharge lamps

EP 0081285 B1 · Applicant: Cornell-Dubilier Electronics Inc.

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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 October 5, 1982 and granted January 13, 1988. A European patent lasts at most 20 years from filing, so its term ended October 5, 2002.
  • 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 5, 2008.
  • 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 5, 1982
PublishedJune 15, 1983
GrantedJanuary 13, 1988
Term endedOctober 5, 2002
Application numberEP 82305283
Classification (CPC)H05B41/3922

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedOct 5, 1982PublishedJune 15, 1983Patent grantedJan 13, 1988Term endedOct 5, 2002

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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