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:
Jun. 18, 2002
Filed:
May. 18, 2000
John R. Johnson, Euclid, OH (US);
James D. Burrington, Mayfield Village, OH (US);
Christopher J. Kolp, Richmond Heights, OH (US);
John K. Pudelski, Cleveland Heights, OH (US);
Jeffry G. Dietz, University Heights, OH (US);
Gregory R. McCullough, Seabrook, TX (US);
Charles K. Baumanis, Geneva, OH (US);
Carlos L. Cerda de Groote, Lakewood, OH (US);
The Lubrizol Corporation, Wickliffe, OH (US);
Abstract
A dispersant is prepared from an amine and a hydrocarbyl-substituted acylating agent, wherein the hydrocarbyl substituent is a polymerized olefin having a polydispersity {overscore (M)} /{overscore (M)} of greater than 5. Such polyolefin substituents are prepared by polymerization of olefins in the presence of a calcined catalyst comprising a partially or fully neutralized ammonium salt of a heteropolyacid.