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Expired European patentEurope

Method for evaluating smooth surfaces

EP 0360838 B1 · Applicant: ASHLAND OIL, 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 26, 1988 and granted January 11, 1995. A European patent lasts at most 20 years from filing, so its term ended July 26, 2008.
  • 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 26, 2014.
  • 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 26, 1988
PublishedApril 4, 1990
GrantedJanuary 11, 1995
Term endedJuly 26, 2008
Application numberEP 88906518
Classification (CPC)G01B11/303

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedJuly 26, 1988PublishedApril 4, 1990Patent grantedJan 11, 1995Term endedJuly 26, 2008

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.