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. 04, 1994
Filed:
Apr. 19, 1991
Applicant:
Inventors:
C Monroe Copeland, Crosby, TX (US);
Frank McKay, Highlands, TX (US);
John M Noreyko, Seabrook, TX (US);
Michael Rombs, Deer Park, TX (US);
Darrell Sutherland, Pasadena, TX (US);
Assignee:
Lyondell Petrochemical Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10G / ; C10G / ;
U.S. Cl.
CPC ...
208012 ; 208144 ; 208145 ; 208143 ;
Abstract
A hydrofinishing process for improving the color, thermal and oxidative stability of a base stock for lubricating oil wherein the lubricating oil stock is contacted with hydrogen in the presence of a nickel-molybdenum catalyst, at a pressure in the range of 400 psi to 3000 psi, at a weight hourly space velocity in the range of 0.25-4.5 and at a temperature in the range of 550.degree. F. to 750.degree. F.