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Expired European patentEurope

Semiconductor laser and method of manufacturing same

EP 0270170 B1 · Applicant: Philips Electronics N.V.

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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 25, 1987 and granted November 13, 1991. A European patent lasts at most 20 years from filing, so its term ended November 25, 2007.
  • 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 25, 2013.
  • 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 25, 1987
PublishedJune 8, 1988
GrantedNovember 13, 1991
Term endedNovember 25, 2007
Application numberEP 87202312
Classification (CPC)H01S5/227

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedNov 25, 1987PublishedJune 8, 1988Patent grantedNov 13, 1991Term endedNov 25, 2007

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.