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:
Jul. 02, 2002
Filed:
Oct. 15, 1999
Applicant:
Inventors:
Wen-Qing Xu, Macon, GA (US);
Gary M. Freeman, Macon, GA (US);
Assignee:
J. M. Huber Corporation, Edison, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01F 7/02 ; C01F 7/44 ;
U.S. Cl.
CPC ...
C01F 7/02 ; C01F 7/44 ;
Abstract
A structured boehmite pigment which comprises a plurality of alumina monohydrate particles. The pigment is particularly useful as a flatting pigment in paint and as an anti-block agent in plastic film. The boehmite pigment has an aggregate median particle size of about 8 to about 30 microns; a total pore volume of at least about 0.8 ml/g; a differential pore volume of less than about 0.3 ml/g; an oil absorption of about 70 to about 135 m/g; a BET surface area of about 3 to about 20 m /g, and a TAPPI brightness of at least about 90.