Patent Yard Sign in
Expired European patentEurope

Coal gasification process

EP 0148554 B1 · Applicant: British Gas Corporation

EPO PDF

Overview

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

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed August 17, 1984 and granted October 19, 1988. A European patent lasts at most 20 years from filing, so its term ended August 17, 2004.
  • 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 17, 2010.
  • 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 17, 1984
PublishedJuly 17, 1985
GrantedOctober 19, 1988
Term endedAugust 17, 2004
Application numberEP 84305601
Classification (CPC)C10J3/16 +1 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedAug 17, 1984PublishedJuly 17, 1985Patent grantedOct 19, 1988Term endedAug 17, 2004

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.