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:
Oct. 06, 1992
Filed:
Aug. 14, 1990
Applicant:
Inventors:
Masanobu Kawamura, Iwakuni, JP;
Shinji Hamada, Iwakuni, JP;
Takashi Date, Iwakuni, JP;
Toshihiro Sugiwaki, Kuga, JP;
Nobuhiro Hanada, Iwakuni, JP;
Assignee:
Sanyo-Kokusaku Pulp Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08C / ; C08C / ; D06P / ;
U.S. Cl.
CPC ...
528149 ; 81156 ; 8912 ; 8557 ; 562 45 ; 562 58 ; 562 59 ; 528 86 ; 106 3835 ; 44553 ;
Abstract
A production method of novel condensates comprising bisphenols and aromatic aminosulfonic acids, in particular, novel 4-aminobenzenesulfonic acid-2, 2-bis(4-hydrocyphenyl)propaneformaldehyde type condensate and said condensate itself are disclosed. Uses of condensates as a dispersant for disperse dye, additive for carbonaceous fine powder-water slurry and water-reducing agent for cement are also claimed.