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Expired Canadian patentCanada

Method for reducing the level of elemental sulfur and total sulfur in hydrocarbon streams

CA 2573470 C · Owner: Feimer, Joseph L. · Inventors: Feimer, Joseph L.; Lawlor, Lawrence J.; Leclair, David J.

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Abstract From the Canadian patent

A method for reducing the level of elemental sulfur from sulfur-containing hydrocarbon streams as well as reducing the level of total sulfur in such streams. Preferred hydrocarbon streams include fuel streams such as naphtha and distillate streams that are transported through a pipeline. The sulfurcontaining hydrocarbon stream is blended with an aqueous solution of water a , caustic, and at least one metal sulfide thereby resulting in an organic phase and an aqueous phase. The blended stream is then passed through a bed of solids having a suitable surface area so that a substantial amount of the sulfur moieties are removed by the aqueous phase.

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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

  • Filed June 24, 2005 and granted May 21, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 24, 2025.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 24, 2005
GrantedMay 21, 2013
Term endedJune 24, 2025
Patent numberCA 2573470 C
Classification (IPC)C10G29/10 +2 more

Timeline

Timeline From CIPO dates

2006200820102012201420162018202020222024Application filedJune 24, 2005Patent grantedMay 21, 2013Term endedJune 24, 2025

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