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:
Feb. 10, 1987
Filed:
Apr. 02, 1985
Abbas Al-Saigh, Fort McMurray, CA;
Alberta Energy Company Ltd., Calgary, CA;
Canadian Ocidental Petroleum Ltd., Calgary, CA;
Esso Resources Canada Limited, Calgary, CA;
Gulf Canada Limited, Toronto, CA;
Her Majesty the Queen in right of the Province of Alberta Canada, as, , US;
HBOG-Oil Sands Limited Partnership, Calgary, CA;
PanCanadian Petroleum Limited, Calgary, CA;
Petro-Canada Inc., Calgary, CA;
Abstract
A basket is removably inserted in the upper end of each drain tube in those interbed assemblies of a catalytic tower whose catalyst beds are to be removed upwardly by vacuuming. The basket has a grid for a bottom wall, so that catalyst particles thereabove are retained but fluid being treated in the tower can easily pass therethrough. The provision of the baskets makes it possible to downwardly drain spent catalyst from the lower bed sections while simultaneously vacuuming it upwardly from the upper bed sections.