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Expired European patentEurope

Optical communications system and method

EP 0240119 B1 · Applicant: POLAROID CORPORATION

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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 February 17, 1987 and granted March 31, 1993. A European patent lasts at most 20 years from filing, so its term ended February 17, 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 August 17, 2012.
  • 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.
FiledFebruary 17, 1987
PublishedOctober 7, 1987
GrantedMarch 31, 1993
Term endedFebruary 17, 2007
Application numberEP 87301352
Classification (CPC)H04J14/0227 +2 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedFeb 17, 1987PublishedOct 7, 1987Patent grantedMarch 31, 1993Term endedFeb 17, 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.