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Expired European patentEurope

Refractories of silicon carbide and related materials having a modified silicon nitride bonding phase

EP 0153000 B1 · Applicant: THE CARBORUNDUM COMPANY

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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 7, 1985 and granted September 14, 1988. A European patent lasts at most 20 years from filing, so its term ended January 7, 2005.
  • 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 7, 2010.
  • 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 7, 1985
PublishedAugust 28, 1985
GrantedSeptember 14, 1988
Term endedJanuary 7, 2005
Application numberEP 85300084
Classification (CPC)C04B35/65 +2 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedJan 7, 1985PublishedAug 28, 1985Patent grantedSep 14, 1988Term endedJan 7, 2005

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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