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Expired European patentEurope

Method and apparatus for investigating the physical properties of material surface layer

EP 0819934 B1 · Applicant: Japan Science and Technology 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 May 19, 1997 and granted August 18, 1999. A European patent lasts at most 20 years from filing, so its term ended May 19, 2017.
  • 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 November 19, 2022.
  • 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.
FiledMay 19, 1997
PublishedJanuary 21, 1998
GrantedAugust 18, 1999
Term endedMay 19, 2017
Application numberEP 97108094
Classification (CPC)G01N23/2209

Timeline

Timeline From EPO dates

1998200020022004200620082010201220142016Application filedMay 19, 1997PublishedJan 21, 1998Patent grantedAug 18, 1999Term endedMay 19, 2017

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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