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:
Jan. 11, 1994
Filed:
May. 06, 1992
Applicant:
Inventors:
Cheng-Chueh Kuo, Baton Rouge, LA (US);
David M Marchand, Baton Rouge, LA (US);
Assignee:
Ethyl Corporation, Richmond, VA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
436-6 ; 422 53 ; 73 5306 ;
Abstract
A bench-test method which correlates well with other more costly engine test methods, and which can be used to screen oleaginous formulation prior to performing expensive engine tests. The method comprises a) contacting ball bearing(s) having a smooth surface area with an oleaginous fluid to be screened; b) treating the oleaginous fluid during contacting with corrosive vapor for a period of time and at a temperature sufficient to form a metal oxide coating on the ball bearing(s) surface; and c) visually rating the metal oxide coating on the ball bearings.