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:
Aug. 03, 1993
Filed:
Jun. 08, 1992
Applicant:
Inventors:
Masanobu Kawamura, Iwakuni, JP;
Shinji Hamada, Iwakuni, JP;
Takashi Date, Iwakuni, JP;
Toshihiro Sugiwaki, Yamaguchi, JP;
Nobuhiro Hanada, Iwakuni, JP;
Assignee:
Sanyo-Kokusaku Pulp Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ; C04B / ; C04B / ;
U.S. Cl.
CPC ...
528161 ; 528129 ; 528155 ; 528162 ; 528163 ; 106499 ; 106503 ; 106725 ; 106808 ; 106823 ; 524-3 ; 524-4 ; 524-6 ; 524843 ;
Abstract
Novel condensates comprising bisphenols and aromatic aminosulfonic acids, in particular, novel 4-aminobenzenesulfonic acid-2,2-bis (hydroxyphenyl)propaneformaldehyde condensates, and methods for their production are disclosed. The novel condensates are useful as a dispersant for disperse dyes, an additive for carbonaceous fine powder-water slurries and as a water reducing agent for cement.