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Expired European patentEurope

Ballast for starting and operating high pressure discharge lamps

EP 0540924 B1 · Applicant: Hella KG Hueck & Co.

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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 17, 1992 and granted August 16, 1995. A European patent lasts at most 20 years from filing, so its term ended October 17, 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 17, 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 17, 1992
PublishedMay 12, 1993
GrantedAugust 16, 1995
Term endedOctober 17, 2012
Application numberEP 92117789
Classification (CPC)H05B41/388 +2 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedOct 17, 1992PublishedMay 12, 1993Patent grantedAug 16, 1995Term endedOct 17, 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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