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Expired European patentEurope

Process and device for operating discharge lamps through electronic ballasts

EP 0488002 B1 · Applicant: Holzer, Walter, Senator h.c. Dr.h.c.Ing.

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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 November 16, 1991 and granted June 7, 1995. A European patent lasts at most 20 years from filing, so its term ended November 16, 2011.
  • 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 May 16, 2017.
  • 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.
FiledNovember 16, 1991
PublishedJune 3, 1992
GrantedJune 7, 1995
Term endedNovember 16, 2011
Application numberEP 91119588
Classification (CPC)H05B41/36 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedNov 16, 1991PublishedJune 3, 1992Patent grantedJune 7, 1995Term endedNov 16, 2011

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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