Chromatographic fractionation of coal liquids
CA 1063521 A · Owner: Mobil Oil Corporation · Inventors: Farcasiu, Malvina; Whitehurst, Darrell D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Processed coal liquids such as solvent refined coal are subjected to multistage liquid chromatographic fractionation. There is employed a succession of eluants of progressively varying properties this succession having the effect of removing from the substrate a corresponding succession of sharply defined chemically differentiated, product groups each of value as an industrial raw material. An installation for practising the invention on a continuous basis is described.
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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
- Granted October 2, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 2, 1996.
- 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.