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:
Apr. 14, 2015
Filed:
Mar. 15, 2010
Patrick L. Ting, Brookfield, WI (US);
Fran L. Saunders, Whitefish Bay, WI (US);
Rhonda M. Dannenberg, Port Washington, WI (US);
Jacqueline A. Laumann, Wales, WI (US);
John T. Eplett, Iii, Wauwatosa, WI (US);
Gregory P. Casey, Littleton, CO (US);
David S. Ryder, Mequon, WI (US);
Patrick L. Ting, Brookfield, WI (US);
Fran L. Saunders, Whitefish Bay, WI (US);
Rhonda M. Dannenberg, Port Washington, WI (US);
Jacqueline A. Laumann, Wales, WI (US);
John T. Eplett, III, Wauwatosa, WI (US);
Gregory P. Casey, Littleton, CO (US);
David S. Ryder, Mequon, WI (US);
MillerCoors LLC, Wilmington, DE (US);
Abstract
A method for reducing the amount of beverage soluble metal ions in a diatomaceous earth filter aid is disclosed. The beverage soluble metal ions can be copper and/or iron. In the method, the diatomaceous earth filter aid is contacted with a hop compound selected from iso-alpha-acids, dihydroiso-alpha-acids, tetrahydroiso-alpha-acids, hexahydroiso-alpha-acids, alpha-acids, and beta-acids. The diatomaceous earth filter aid can also be contacted with and an acid other than the hop compound such as phosphoric acid. The iso-alpha-acids, dihydroiso-alpha-acids, tetrahydroiso-alpha-acids, hexahydroiso-alpha-acids, alpha-acids, or beta-acids bind the copper and iron metal ions and/or change the form of copper and iron in diatomaceous earth so the copper and iron are rendered substantially insoluble in a beverage such as beer. A method for filtering a beverage using the treated diatomaceous earth filter aid is also disclosed. A method for increasing the flavor stability of a malt beverage filtered with a diatomaceous earth filter aid is also disclosed.