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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.:

US 9481797 B1

PDFFull Text
Date of Patent:
Nov. 01, 2016

Filed:

Aug. 09, 2011

Pigment for paper and paper laminate

Applicants:

Neil Burniston, Lincs, GB;

Robert Burniston, Lincs, GB;

Inventors:

Neil Burniston, Lincs, GB;

Robert Burniston, Lincs, GB;

Assignee:

Cristal USA Inc., Hunt Valley, MD (US);

Attorney:
Primary Examiner:

Ronak Patel

Int. Cl.
CPC ...
B32B 5/16 (2006.01); B32B 29/00 (2006.01); C08K 3/22 (2006.01); C09C 1/36 (2006.01); C09C 1/40 (2006.01); C09C 3/00 (2006.01); C09C 3/06 (2006.01); C09C 3/12 (2006.01); C09C 1/00 (2006.01); C09C 1/24 (2006.01); C09C 1/34 (2006.01); D21H 17/67 (2006.01); D21H 17/69 (2006.01); D21H 19/38 (2006.01); D21H 21/52 (2006.01);
U.S. Cl.
CPC ...
C09C 1/3661 (2013.01); C09C 1/0081 (2013.01); C09C 1/0084 (2013.01); C09C 1/0087 (2013.01); C09C 1/24 (2013.01); C09C 1/343 (2013.01); C09C 1/3684 (2013.01); C09C 1/3692 (2013.01); C09C 1/407 (2013.01); C09C 3/006 (2013.01); C09C 3/063 (2013.01); C09C 3/12 (2013.01); D21H 17/67 (2013.01); D21H 17/69 (2013.01); D21H 19/38 (2013.01); D21H 21/52 (2013.01); C01P 2004/62 (2013.01); C01P 2004/80 (2013.01); Y10T 428/257 (2015.01);
Abstract

A pigment mixture comprising (a) pigment particles, (b) colloidal spacer particles dispersed on surfaces of the pigment particles, and (c) carrier particles, wherein the pigment particles with colloidal spacer particles are dispersed on surfaces of the carrier particles. A pigment mixture of titanium dioxide pigment particles having colloidal silica spacer particles on surfaces of the titanium dioxide, the titanium dioxide and colloidal silica attached to surfaces of diatomaceous earth carrier particles, provides improved optical efficiency of the pigment and improved retention in a paper fiber matrix.

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