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Expired European patentEurope

Process for the recovery of hydrocarbons from a hydrocarbon rich gel

EP 0535477 B1 · Applicant: CASSELLA Aktiengesellschaft

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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 September 19, 1992 and granted July 26, 1995. A European patent lasts at most 20 years from filing, so its term ended September 19, 2012.
  • 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 March 19, 2018.
  • 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.
FiledSeptember 19, 1992
PublishedApril 7, 1993
GrantedJuly 26, 1995
Term endedSeptember 19, 2012
Application numberEP 92116063
Classification (CPC)C10G33/04

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedSep 19, 1992PublishedApril 7, 1993Patent grantedJuly 26, 1995Term endedSep 19, 2012

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

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