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. 15, 2009
Filed:
Dec. 18, 2008
Applicants:
Stephen M. Imfeld, Mason, OH (US);
Robert L. Sherman, Jr., Blue Ash, OH (US);
Andrew W. Lake, Alvin, TX (US);
Inventors:
Stephen M. Imfeld, Mason, OH (US);
Robert L. Sherman, Jr., Blue Ash, OH (US);
Andrew W. Lake, Alvin, TX (US);
Assignee:
Equistar Chemicals, LP, Houston, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08F 2/44 (2006.01); C10M 129/10 (2006.01); C10M 129/91 (2006.01); C08F 110/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A lubricating oil suitable for use in α-olefin compressors and a high-pressure ethylene polymerization process is disclosed. The oil comprises a base fluid and a hindered C-Calkyl 4-hydroxybenzoate. The hindered C-Calkyl 4-hydroxybenzoate stabilizes the lubricating oil and does not interfere with the high-pressure α-olefin polymerization.