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Method for determination of chromatic dispersion in a single mode optical fiber

EP 0443209 A2 · Applicant: Hewlett-Packard Company

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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 December 31, 1990 and never granted as a European patent. Had it been granted, its 20-year term would have ended December 31, 2010.
  • 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 July 1, 2016.
  • 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.
FiledDecember 31, 1990
PublishedAugust 28, 1991
GrantedNever granted
Term endedDecember 31, 2010
Application numberEP 90125855
Classification (CPC)G01N21/41 +1 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedDec 31, 1990PublishedAug 28, 1991Term endedDec 31, 2010

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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