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Expired European patentEurope

Method for driving an electrically excited gas laser

EP 0183113 B1 · Applicant: ELTRO GmbH Gesellschaft für Strahlungstechnik

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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 November 9, 1985 and granted September 11, 1991. A European patent lasts at most 20 years from filing, so its term ended November 9, 2005.
  • 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 9, 2011.
  • 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 9, 1985
PublishedJune 4, 1986
GrantedSeptember 11, 1991
Term endedNovember 9, 2005
Application numberEP 85114295
Classification (CPC)H01S3/097 +1 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedNov 9, 1985PublishedJune 4, 1986Patent grantedSep 11, 1991Term endedNov 9, 2005

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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