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Expired European patentEurope

Operation and use of a noble gas ion laser

EP 0177729 B1 · Applicant: SIEMENS AKTIENGESELLSCHAFT

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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 August 26, 1985 and granted October 31, 1990. A European patent lasts at most 20 years from filing, so its term ended August 26, 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 February 26, 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.
FiledAugust 26, 1985
PublishedApril 16, 1986
GrantedOctober 31, 1990
Term endedAugust 26, 2005
Application numberEP 85110690
Classification (CPC)H01S3/03 +2 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedAug 26, 1985PublishedApril 16, 1986Patent grantedOct 31, 1990Term endedAug 26, 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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