A method for producing a carbon disulfide formulation
CA 2820375 C · Owner: Shell Internationale Research Maatschappij B.V. · Inventors: Van Dorp, Johan Jacobus; Wang, Dean Chien; Puik, Eric Johannes
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Sulfur compounds from oil and/or gas recovered from an underground formation are converted into a carbon disulfide formulation by a method comprising: oxidizing a , first portion of at least one sulfur compound in a first reaction zone to yield sulfur dioxide; , reacting at least a portion of the sulfur dioxide with a second portion of the at least one , sulfur compound in a second reaction zone to yield sulfur; and reacting at least a portion of , the sulfur with one or more hydrocarbons in a third reaction zone to yield the carbon , disulfide formulation; and further comprising heating at least a portion of the sulfur using , heat generated in the oxidizing of the sulfur compound. …
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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 April 19, 2006 and granted June 30, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 19, 2026.
- 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.
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.