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Expired European patentEurope

Method and apparatus for fluidizing coal tar sludge

EP 0198705 B1 · Applicant: Burnside, Kenneth D.

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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 April 14, 1986 and granted July 8, 1992. A European patent lasts at most 20 years from filing, so its term ended April 14, 2006.
  • 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 October 14, 2011.
  • 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.
FiledApril 14, 1986
PublishedOctober 22, 1986
GrantedJuly 8, 1992
Term endedApril 14, 2006
Application numberEP 86302772
Classification (CPC)C10L1/322

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedApril 14, 1986PublishedOct 22, 1986Patent grantedJuly 8, 1992Term endedApril 14, 2006

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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