The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 26, 1978
Filed:
Feb. 14, 1977
Kenneth Porteous, Edmonton, CA;
Her Majesty the Queen in right of Canada, as represented by the Minister, , US;
Her Majesty the Queen in right of the Province of Alberta, Government of, , US;
Ontario Energy Corporation, Toronto, CA;
Imperial Oil Limited, Toronto, CA;
Canada-Cities Service, Ltd., Calgary, CA;
Gulf Oil Canada Limited, Toronto, CA;
Abstract
In the hot water process wherein tar sand is slurried in a tumbler with hot water and sodium hydroxide, oversized material, rejected from the tumbler, is mixed with a portion of slurry flood water in a second slurrying device and subjected therein to heating and dispersal of bitumen associated with the rejects. A bitumen-containing slurry is produced from the second device and this slurry is combined with the tumbler slurry and subsequently subjected to flotation to recover bitumen.