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Expired Canadian patentCanada

Coking drum and process for forming improved graphite coke

CA 1110991 A · Owner: The Standard Oil Company · Inventors: Jansma, John C.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Cooling water for cooling coke in a coking drum is charged into the interior of the coking drum from a plurality of orifices located on the lateral surfaces of the coking drum so as to uniformity distribute the cooling effect provided by the cooling water.

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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 October 20, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 13, 1978
GrantedOctober 20, 1981
Term endedOctober 20, 1998
Patent numberCA 1110991 A
Classification (IPC)C10B55/00 +1 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedFeb 13, 1978Patent grantedOct 20, 1981Term endedOct 20, 1998

Sources & verification

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