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Expired European patentEurope

Process for the production of low-asphaltenes hydrocarbon mixtures

EP 0099141 B1 · Applicant: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.

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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 June 14, 1983 and granted April 23, 1986. A European patent lasts at most 20 years from filing, so its term ended June 14, 2003.
  • 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 December 14, 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.
FiledJune 14, 1983
PublishedJanuary 25, 1984
GrantedApril 23, 1986
Term endedJune 14, 2003
Application numberEP 83200869
Classification (CPC)C10G67/0463

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedJune 14, 1983PublishedJan 25, 1984Patent grantedApril 23, 1986Term endedJune 14, 2003

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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