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:
May. 06, 2008
Filed:
Nov. 06, 2003
Process for producing zinc dialkyldithiophosphates exhibiting improved seal compatibility properties
Paul M. Thomson, St. Louis, MO (US);
Peter Growcott, Hartley Wintney, GB;
Roger M. Sheets, Glen Allen, VA (US);
Abbas Kadkhodayan, Collinsville, IL (US);
Christopher James Dudding, Reading, GB;
Paul M. Thomson, St. Louis, MO (US);
Peter Growcott, Hartley Wintney, GB;
Roger M. Sheets, Glen Allen, VA (US);
Abbas Kadkhodayan, Collinsville, IL (US);
Christopher James Dudding, Reading, GB;
Afton Chemical Corporation, Richmond, VA (US);
Abstract
In general terms, the present invention includes a process for producing a new zinc dialkyldithiophosphate (ZDDP) offering improved seal compatibility characteristics in engine and transmission oil packages. The present invention additionally includes zinc dialkyldithiophosphate produced in accordance with the disclosed methodologies, and oil additives, lubricants, and engines and transmission comprising the zinc dialkyldithiophosphate of the present invention.