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:
Jun. 20, 2000
Filed:
Mar. 31, 1998
Applicant:
Inventors:
Minoru Sawai, Wakayama, JP;
Yoichi Ishibashi, Wakayama, JP;
Assignee:
Kao Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
D21B / ;
U.S. Cl.
CPC ...
162-4 ; 162-5 ; 252 60 ; 252 61 ;
Abstract
A deinking method for obtaining regenerated pulp of high brightness is provided. One or more of deinking agents selected from (a-1) to (a-2) given below are used, and a deinking step is carried out, in which a washing step is carried out at treating temperatures from 40 to 80.degree. C.;