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:
Jul. 17, 2018
Filed:
Apr. 05, 2016
Applicant:
Unimin Corporation, New Canaan, CT (US);
Inventors:
Richard C. Zielke, The Woodlands, TX (US);
Feipeng P. Liu, Arden, NC (US);
Assignee:
Covia Holdings Corporation, Independence, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/80 (2006.01); B05D 1/36 (2006.01); B05D 1/02 (2006.01);
U.S. Cl.
CPC ...
C09K 8/805 (2013.01);
Abstract
A long term dust free proppant comprising a mass of free flowing particles, where the particles are coated with a dust suppression solution containing 90 to 99.5 percent by weight water, 0.05 to 3.0 percent by weight a soluble polymer and an added, small amount of a surfactant. The mass has a very low dosage of the solution so the mass has a moisture content of less than 0.30 percent by weight. Preferably the solution is applied to the particles by an air mist jet.