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Expired European patentEurope

Process for the determination of the spatial structure in a layer of an area of investigation

EP 0242895 B1 · Applicant: Philips Electronics N.V.

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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 5, 1987 and granted February 19, 1992. A European patent lasts at most 20 years from filing, so its term ended March 5, 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 5, 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 5, 1987
PublishedOctober 28, 1987
GrantedFebruary 19, 1992
Term endedMarch 5, 2007
Application numberEP 87200402
Classification (CPC)G01N23/20083

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedMarch 5, 1987PublishedOct 28, 1987Patent grantedFeb 19, 1992Term endedMarch 5, 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

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