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:
Mar. 16, 1999
Filed:
Apr. 25, 1997
Applicant:
Inventors:
Assignee:
Sanwa Cornstarch Co., Ltd., Nara, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08B / ; D21F / ;
U.S. Cl.
CPC ...
536 45 ; 1621571 ; 536 48 ; 536 50 ; 536102 ; 536111 ;
Abstract
The present invention provides a cationic starch prepared by roasting starch under the presence of a cationic polymer, a method for preparing the cationic starch, and a method for making paper board with the cationic starch. The method for making paper board of the present invention provides high retention of starch in paper board, enhances paper board strength in a high level and reduces a load of treating waste water from a paper machine, in comparison with the starch which has conventionally been employed for paper making.