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Expired European patentEurope

Method of producing beta-alumina ceramic material and ceramic material made thereof

EP 0013833 B1 · Applicant: WESTINGHOUSE ELECTRIC CORPORATION

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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 December 28, 1979 and granted November 30, 1983. A European patent lasts at most 20 years from filing, so its term ended December 28, 1999.
  • 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 June 28, 2005.
  • 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.
FiledDecember 28, 1979
PublishedAugust 6, 1980
GrantedNovember 30, 1983
Term endedDecember 28, 1999
Application numberEP 79303054
Classification (CPC)C01F7/028 +2 more

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedDec 28, 1979PublishedAug 6, 1980Patent grantedNov 30, 1983Term endedDec 28, 1999

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.