Method for increasing methane recovery from a subterranean coal formation by injection of tail gas from a hydrocarbon synthesis process
CA 2196376 C · Owner: Bross, Stephen V. · Inventors: Dinh, Vu P.; Bross, Stephen V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for increasing the production of methane from a subterranean coal formation penetrated by at least one injection well and at least one production well by-producing methane from the coal formation; passing at least a portion of the methane to a synthesis gas generation zone wherein at least a major portion of the methane is reacted with an oxygen-containing gas to produce a mixture of carbon monoxide and hydrogen; passing at least a major portion of the mixture to a hydrocarbon synthesis zone wherein the carbon monoxide and hydrogen are reacted to produce a mixture of heavier hydrocarbons containing more than one carbon atom per molecule and a tail gas comprising nitrogen and carbon …
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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 January 30, 1997 and granted January 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 30, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 2019.
- 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
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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.