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Expired European patentEurope

Refractory lining of coke oven doors in two spaced layers so as to create a roomy gas flue chamber

EP 0286786 B1 · Applicant: PREFIN S.R.L.

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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 29, 1988 and granted November 28, 1990. A European patent lasts at most 20 years from filing, so its term ended January 29, 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 July 29, 2013.
  • 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 29, 1988
PublishedOctober 19, 1988
GrantedNovember 28, 1990
Term endedJanuary 29, 2008
Application numberEP 88101307
Classification (CPC)C10B25/06

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedJan 29, 1988PublishedOct 19, 1988Patent grantedNov 28, 1990Term endedJan 29, 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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