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Expired European patentEurope

A method of making abrasive bodies

EP 0090657 B1 · Applicant: DE BEERS INDUSTRIAL DIAMOND DIVISION (PROPRIETARY) LIMITED

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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 March 30, 1983 and granted January 7, 1987. A European patent lasts at most 20 years from filing, so its term ended March 30, 2003.
  • 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 30, 2008.
  • 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 30, 1983
PublishedOctober 5, 1983
GrantedJanuary 7, 1987
Term endedMarch 30, 2003
Application numberEP 83301794
Classification (CPC)C04B35/645 +2 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedMarch 30, 1983PublishedOct 5, 1983Patent grantedJan 7, 1987Term endedMarch 30, 2003

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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