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Expired Canadian patentCanada

Process for removal of mercury from a liquid hydrocarbon

CA 1323321 C · Owner: Sato, Kunio · Inventors: Matsuzawa, Tooru; Sato, Kunio; Sato, Kazuo

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Abstract From the Canadian patent

A liquid hydrocarbon such as a natural gas liquid generally contains a small amount of mercury in a state of elemental mercury ionized, mercury, ionizable mercury compounds which are requested to be removed, thoroughly. Further organic mercury compounds are contained in some natural gas liquid and other liquid hydrocarbons depending on their district of production, and its removal is also necessary. Already known adsorbents can adsorb elemental mercury and organic mercury compounds in a liquid hydrocarbon, but they hardly adsorb ionizable mercury compounds and ionized mercury derived from the ionizable mercury compounds. According to the present invention which comprises contacting the …

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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 19, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 19, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 12, 1989
GrantedOctober 19, 1993
Term endedOctober 19, 2010
Patent numberCA 1323321 C
Classification (IPC)C10G29/10 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedMay 12, 1989Patent grantedOct 19, 1993Term endedOct 19, 2010

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