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:
Sep. 20, 1983
Filed:
Mar. 08, 1982
Applicant:
Inventors:
Frank G Serafin, Peabody, MA (US);
Robert W Previte, Lawrence, MA (US);
Nathan R Greening, Ft. Collins, CO (US);
David L Kantro, Aurora, OH (US);
Fulvio J Tang, Mundelein, IL (US);
Assignee:
W. R. Grace & Co., Cambridge, MA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
106 90 ; 106 97 ; 106315 ;
Abstract
Disclosed herein are gypsum-free cement compositions comprising portland cement, limestone and an amine salt of formic or acetic acid. The compositions exhibit compressive strength comparable to ordinary portland cement compositions containing gypsum and the setting properties of the compositions can be regulated.