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Expired European patentEurope

Whisker reinforced ceramics and a method of clad/hot isostatic pressing same

EP 0377654 B1 · Applicant: KENNAMETAL INC.

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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 August 8, 1988 and granted July 21, 1993. A European patent lasts at most 20 years from filing, so its term ended August 8, 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 February 8, 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.
FiledAugust 8, 1988
PublishedJuly 18, 1990
GrantedJuly 21, 1993
Term endedAugust 8, 2008
Application numberEP 88908481
Classification (CPC)C04B41/009 +2 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedAug 8, 1988PublishedJuly 18, 1990Patent grantedJuly 21, 1993Term endedAug 8, 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

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