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Expired European patentEurope

Method of measurement of residual stresses in the material of the object under test

EP 0242807 B1 · Applicant: Polska Akademia Nauk Instytut Podstawowych Problemow Techniki

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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 April 16, 1987 and granted October 20, 1993. A European patent lasts at most 20 years from filing, so its term ended April 16, 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 October 16, 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.
FiledApril 16, 1987
PublishedOctober 28, 1987
GrantedOctober 20, 1993
Term endedApril 16, 2007
Application numberEP 87105677
Classification (CPC)G01N29/07

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedApril 16, 1987PublishedOct 28, 1987Patent grantedOct 20, 1993Term endedApril 16, 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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