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Expired European patentEurope

Improved quantum cascade laser

EP 0964488 B1 · Applicant: LUCENT TECHNOLOGIES INC.

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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 May 26, 1999 and granted November 7, 2001. A European patent lasts at most 20 years from filing, so its term ended May 26, 2019.
  • 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 November 26, 2024.
  • 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.
FiledMay 26, 1999
PublishedDecember 15, 1999
GrantedNovember 7, 2001
Term endedMay 26, 2019
Application numberEP 99304076
Classification (CPC)B82Y20/00 +1 more

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedMay 26, 1999PublishedDec 15, 1999Patent grantedNov 7, 2001Term endedMay 26, 2019

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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