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Expired European patentEurope

Ground proximity warning system for an excessive descent rate over undulating terrain

EP 0281576 B1 · Applicant: AlliedSignal 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 July 15, 1987 and granted October 8, 1997. A European patent lasts at most 20 years from filing, so its term ended July 15, 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 January 15, 2013.
  • 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.
FiledJuly 15, 1987
PublishedSeptember 14, 1988
GrantedOctober 8, 1997
Term endedJuly 15, 2007
Application numberEP 87905331
Classification (CPC)G01C5/005 +1 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedJuly 15, 1987PublishedSep 14, 1988Patent grantedOct 8, 1997Term endedJuly 15, 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.