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Expired European patentEurope

Method and apparatus for measuring the thickness of a coating

EP 0443322 B1 · Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

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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 January 16, 1991 and granted September 7, 1994. A European patent lasts at most 20 years from filing, so its term ended January 16, 2011.
  • 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 July 16, 2016.
  • 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.
FiledJanuary 16, 1991
PublishedAugust 28, 1991
GrantedSeptember 7, 1994
Term endedJanuary 16, 2011
Application numberEP 91100472
Classification (CPC)G01B11/0616

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedJan 16, 1991PublishedAug 28, 1991Patent grantedSep 7, 1994Term endedJan 16, 2011

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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