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:
Jul. 26, 1988
Filed:
Oct. 31, 1986
Applicant:
Inventors:
Yasusuke Ochi, Wakayama, JP;
Tatsuya Mizunuma, Wakayama, JP;
Kimio Kurosaka, Wakayama, JP;
Tatsuo Izumi, Izumisano, JP;
Shuichi Fujita, Wakayama, JP;
Assignee:
Kao Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
106314 ; 106 90 ; 524-2 ; 524593 ; 528232 ; 528247 ; 528265 ;
Abstract
A hydraulic cement composition is effectively dispersed with the use as a dispersion agent of a reaction product obtained by oxidizing and polymerizing a condensate of formaldehyde with a naphthalenesulfonic acid salt and/or an alkylnaphthalenesulfonic acid salt to produce a constitutional unit which is derived by elimination of a methylene group, hydroxyzation and condensation polmerization, or oxidation and ring-opening of the naphthalene ring.