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Expired European patentEurope

Deasphaltenating cat cracker bottoms and production of pitch carbon artifacts

EP 0072243 B1 · Applicant: E.I. DU PONT DE NEMOURS AND 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 August 10, 1982 and granted November 11, 1987. A European patent lasts at most 20 years from filing, so its term ended August 10, 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 February 10, 2008.
  • 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.
FiledAugust 10, 1982
PublishedFebruary 16, 1983
GrantedNovember 11, 1987
Term endedAugust 10, 2002
Application numberEP 82304206
Classification (CPC)C10G21/003 +2 more

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedAug 10, 1982PublishedFeb 16, 1983Patent grantedNov 11, 1987Term endedAug 10, 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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