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Expired European patentEurope

Method and apparatus for determining position

EP 0047243 B1 · Applicant: NATIONAL RESEARCH DEVELOPMENT CORPORATION

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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 October 16, 1980 and granted January 23, 1985. A European patent lasts at most 20 years from filing, so its term ended October 16, 2000.
  • 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 April 16, 2006.
  • 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.
FiledOctober 16, 1980
PublishedMarch 17, 1982
GrantedJanuary 23, 1985
Term endedOctober 16, 2000
Application numberEP 80901949
Classification (CPC)G01C15/004

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedOct 16, 1980PublishedMarch 17, 1982Patent grantedJan 23, 1985Term endedOct 16, 2000

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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