Improved process for removing elemental sulfur from pipeline-transported refined hydrocarbon fuels
CA 2456491 C · Owner: Imperial Oil · Inventors: Feimer, Joseph L.; Lawlor, Lawrence J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for removing sulfur from a hydrocarbon stream the method comprising: mixing said hydrocarbon stream with an aqueous-alkali or alcohol-alkali solution containing an alkali metal sulfide under effective conditions; separating the majority of the aqueous-alkali or alcohol-alkali solution from the hydrocarbon phase; and treating the recovered hydrocarbon phase containing a residual amount of entrained aqueous-alkali or alcohol-alkali solution in a packed bed of solids to produce a hydrocarbon product which is substantial free of elemental sulfur.
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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 February 3, 2004 and granted October 9, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 3, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 3, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.