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:
Jun. 19, 2007
Filed:
Mar. 24, 2006
Leslie A. Jardine, Salem, MA (US);
Charles R. Cornman, Maynard, MA (US);
Vijay Gupta, Woburn, MA (US);
Byong-wa Chun, Newton Upper Falls, MA (US);
Leslie A. Jardine, Salem, MA (US);
Charles R. Cornman, Maynard, MA (US);
Vijay Gupta, Woburn, MA (US);
Byong-Wa Chun, Newton Upper Falls, MA (US);
W. R. Grace & Co.-Conn., Columbia, MD (US);
Abstract
Exemplary compositions and methods for reducing hexavalent chromium in cementitious compositions involve the use of a liquid additive composition, comprising stannous chloride. Along with the stannous chloride may be used at least one co-additive comprising an antioxidant, oxygen scavenger, or mixture thereof, and/or at least one agent comprising a cement grinding aid, cement quality improver, or mixture thereof.