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:
Oct. 15, 2002
Filed:
Nov. 10, 2000
Applicant:
Inventors:
Edward H. Sung, Cincinnati, OH (US);
George H. Robertson, Loveland, OH (US);
Chris M. Arizo, Maineville, OH (US);
Assignee:
Sun Chemical Corporation, Fort Lee, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B 6/714 ;
U.S. Cl.
CPC ...
C09B 6/714 ;
Abstract
A method of acid swelling crude perylene pigment by treating the crude with about 2 to 10 parts by weight of toluene sulfonic acid at an elevated pressure and at temperatures ranging from 40 to 140° C.