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. 26, 1998
Filed:
Feb. 13, 1996
Applicant:
Inventors:
Brian Frederic Satterfield, Columbia, SC (US);
Bruce Evans, Bethlehem, PA (US);
Thomas Adrian Cauley, Burlington, CA;
Assignees:
Allied Colloids Limited, West Yorkshire, GB;
Minerals Technologies Inc., Bethlehem, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
D21H / ;
U.S. Cl.
CPC ...
1621641 ; 1621643 ; 1621645 ; 162165 ; 1621682 ; 1621683 ; 162175 ; 1621811 ; 1621812 ; 162183 ;
Abstract
Filled paper is made by adding a cationising amount of cationic polymer to precipitated calcium carbonate or other filler either as a slurry or in a thick stock component, producing a thin stock containing the cationised filler and then treating the thin stock with a formaldehyde resin and polyethylene oxide as a retention system prior to drainage and drying.