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. 28, 1993
Filed:
Apr. 14, 1992
Applicant:
Inventor:
Thomas K Perkins, Dallas, TX (US);
Assignee:
Atlantic Richfield Company, Los Angeles, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B08B / ;
U.S. Cl.
CPC ...
134 2219 ; 134 221 ; 134 2218 ; 134 26 ; 134 36 ;
Abstract
Deposits are removed from cargo tanks of marine crude oil tankers and the like by introducing into the tanks a solvent for the deposits which are formed on the interior surfaces of the tanks, including those surfaces which cannot be reached by crude oil washing machines and the like. The solvent is caused to contact all of the interior surfaces of the tanks by pumping ballast water sequentially into and out of the tanks to cause the solvent to rise and fall in each of the tanks. The method may be carried out during return trips of tankers from the point of discharge of cargo to the point of loading new cargo.