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:
Aug. 27, 2019
Filed:
Dec. 14, 2015
Applicant:
Ep Minerals, Llc, Reno, NV (US);
Inventors:
Assignee:
EP MINERALS, LLC, Reno, NV (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 39/06 (2006.01); B01D 39/20 (2006.01); B01D 37/02 (2006.01); B01J 20/14 (2006.01); C02F 1/28 (2006.01);
U.S. Cl.
CPC ...
B01D 39/06 (2013.01); B01D 37/02 (2013.01); B01D 39/2075 (2013.01); B01J 20/14 (2013.01); C02F 1/286 (2013.01);
Abstract
A powdered composite filtration medium includes composite particles that include at least one diatomite particle and at least one expanded perlite particle sintered together. The composite powdered filtration medium may include from about 7 wt % to about 90 wt % diatomite, from about 93 wt % to about 10 wt % expanded perlite. Less than about 1% total crystalline silica may be present in the medium. The medium may have a permeability of at least 0.25 darcy. The diatomite and expanded perlite may be sintered or calcined with or without a fluxing agent.