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:
Jan. 17, 2012
Filed:
Apr. 30, 2008
Michael B. Macklin, Auckland, NZ;
Mark A. Franciosi, Westminster, MA (US);
Leslie A. Jardine, Burlington, MA (US);
Byong-wa Chun, Newton, MA (US);
Michael B. Macklin, Auckland, NZ;
Mark A. Franciosi, Westminster, MA (US);
Leslie A. Jardine, Burlington, MA (US);
Byong-wa Chun, Newton, MA (US);
W. R. Grace & Co.-Conn., Columbia, MD (US);
Abstract
An additive composition, a cement composition, and method for modifying rheology of an uncured masonry cement, comprising the use of at least one extra-cellular biopolymer, at least one anionic surfactant, and at least one cationic or amphoteric surfactant. Preferably, the biopolymer and surfactants are incorporated into the cement by incorporating the components into the grinding of clinker as part of the manufacture of the cement. Masonry cements produced by the invention have excellent workability, particularly when coarse sands are employed.