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. 10, 2012
Filed:
Nov. 07, 2008
Sanford Lee Hertz, Hoffman Estates, IL (US);
Ed Daraskevich, Oswego, IL (US);
William Tao, Downers Grove, IL (US);
Jason J. Netherton, Kenosha, WI (US);
Matthew S. Gebhard, Cary, IL (US);
T. Howard Killilea, North Oaks, MN (US);
Kevin W. Evanson, Maple Grove, MN (US);
Sanford Lee Hertz, Hoffman Estates, IL (US);
Ed Daraskevich, Oswego, IL (US);
William Tao, Downers Grove, IL (US);
Jason J. Netherton, Kenosha, WI (US);
Matthew S. Gebhard, Cary, IL (US);
T. Howard Killilea, North Oaks, MN (US);
Kevin W. Evanson, Maple Grove, MN (US);
Valspar Corporation, Minneapolis, MN (US);
Abstract
The present invention provides acidic compositions and methods that are adapted to impart color to cementitious or mineral substrate surfaces. Specifically, the present invention relates to acidic compositions and methods adapted to treat cementitious or mineral substrate surfaces that have the advantage of using a less corrosive acid-based solution. The acidic composition incorporates species including a weak base in equilibrium with a conjugate acid. The presence of such species moderates the corrosive behavior of the acid while still allowing excellent coloring action to occur.