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. 11, 1992
Filed:
Mar. 26, 1991
Applicant:
Inventors:
Masanori Iizuka, Wakayama, JP;
Tatsuya Mizunuma, Wakayama, JP;
Fuzio Yamato, Wakayama, JP;
Toshiharu Kojima, Wakayama, JP;
Akitoshi Tuji, Wakayama, JP;
Assignee:
Kao Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ; C04B / ;
U.S. Cl.
CPC ...
106823 ; 106810 ; 106819 ; 524-5 ; 524342 ; 524344 ; 524559 ;
Abstract
An additive to cement comprises a granular zinc salt of a copolymer of an olefin having 2 to 8 carbon atoms and an ethylenically unsaturated dicarboxylic anhydride, prepared by reacting the powder of the copolymer with powder of zinc oxide or zinc hydroxide in the presence of water.