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Expired European patentEurope

Process for the selective sealing of parallel channel ends of ceramic structures, and pasty composition for performing it

EP 0056983 B1 · Applicant: COMPAGNIE GENERALE D'ELECTRICITE Société anonyme dite:

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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 21, 1982 and granted June 13, 1984. A European patent lasts at most 20 years from filing, so its term ended January 21, 2002.
  • 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 21, 2007.
  • 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 21, 1982
PublishedAugust 4, 1982
GrantedJune 13, 1984
Term endedJanuary 21, 2002
Application numberEP 82100388
Classification (CPC)C03C12/00 +2 more

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedJan 21, 1982PublishedAug 4, 1982Patent grantedJune 13, 1984Term endedJan 21, 2002

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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