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:
May. 04, 1976
Filed:
Feb. 21, 1974
Applicant:
Inventors:
Hiroshi Uchikawa, Funabashi, JA;
Hajime Kato, Yokohama, JA;
Assignee:
Onoda Cement Company, Ltd., Yamaguchi, JA;
Primary Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ;
U.S. Cl.
CPC ...
106 89 ; 106 90 ; 106 92 ; 106 95 ; 106104 ; 106315 ;
Abstract
This invention relates to a method for retarding the setting time of rapid hardening cement which comprises adding a boric compound to cement manufactured by adding insoluble anhydrite to clinker powder containing 11CaO.7Al.sub.2 O.sub.3.CaX.sub.2 or adding the clinker to insoluble anhydrite and intergrinding the mixture, and a method for still more retarding the setting time of rapid hardening cement which comprises adding a boric compound to cement containing a set-retarding agent other than the boric compound.