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European application, no grantEurope

Process for preparing a liquid fuel composition

EP 0051909 A2 · Applicant: GULF RESEARCH & DEVELOPMENT COMPANY

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 21, 1981 and never granted as a European patent. Had it been granted, its 20-year term would have ended April 21, 2001.
  • 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 21, 2006.
  • 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 21, 1981
PublishedMay 19, 1982
GrantedNever granted
Term endedApril 21, 2001
Application numberEP 81301730
Classification (CPC)C10G1/002 +1 more

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedApril 21, 1981PublishedMay 19, 1982Term endedApril 21, 2001

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.