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European application, no grantEurope

Transponder based positioning system

EP 0242983 A2 · Applicant: Unisys Corporation

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 March 19, 1987 and never granted as a European patent. Had it been granted, its 20-year term would have ended March 19, 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 September 19, 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.
FiledMarch 19, 1987
PublishedOctober 28, 1987
GrantedNever granted
Term endedMarch 19, 2007
Application numberEP 87302361
Classification (CPC)G01S13/876

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedMarch 19, 1987PublishedOct 28, 1987Term endedMarch 19, 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.