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Expired Canadian patentCanada

Ruthenium catalysts, and use thereof for fischer- tropsch synthesis

CA 1256420 A · Owner: Exxon Research And Engineering Company · Inventors: Mauldin, Charles H.; Arcuri, Kym B.; Shaw, David H.

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Abstract From the Canadian patent

A novel ruthenium-rhenium-titania catalyst having improved activity maintenance in the production of hydrocarbons via carbon monoxide-hydrogen synthesis reactions is disclosed. A hydrocarbon synthesis process using this catalyst is also disclosed. High quality middle distillate fuels, characterized generally as admixtures of linear paraffins and olefins are formed in the process.

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted June 27, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 27, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 29, 1985
GrantedJune 27, 1989
Term endedJune 27, 2006
Patent numberCA 1256420 A
Classification (IPC)B01J23/64 +1 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedNov 29, 1985Patent grantedJune 27, 1989Term endedJune 27, 2006

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.