Method of refining coal by short residence time hydrodisproportionation
CA 2003795 A1 · Owner: Meyer, Lee G. · Inventors: Cavaliere, Gerald F.; Meyer, Lee G.; Sudduth, Bruce C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, This invention generally relates to short residence time decomposition and volatilization of coal to produce liquid co-products while minimizing production of char and gas without utilization of external hydrogen that is, hydrogen other than that contained in the coal feedstock. The invention more particularly relates to an improved method of economically producing uniform fluidic, oil-, type transportable fuel systems and fuel compositions and a slate of "value-added" co-products by a coal refining process employing short residence time hydrodisproportionation (SRT-HDP). In another embodiment a partial li-, quefaction process is provided using higher pressures for decomposition …
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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 November 24, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 24, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 24, 2011.
- 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.