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. 11, 2017
Filed:
Oct. 23, 2013
Applicant:
Karl-heinz Schofalvi, Hudson, OH (US);
Inventor:
Karl-Heinz Schofalvi, Hudson, OH (US);
Assignee:
HD PROPPANTS LLC, Hudson, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 41/45 (2006.01); C09K 8/80 (2006.01);
U.S. Cl.
CPC ...
C04B 41/4543 (2013.01); C09K 8/805 (2013.01);
Abstract
A proppant is formed by a method including inserting a plurality of particles into a heating device, such as a rotary tunnel kiln. The particles are heated at a first temperature within the heating device. A non-epoxy, non-urethane thermoset coating is heated to at least its melting point or dissolved in a solvent or both, and sprayed into the heating device and onto the particles. The particles are heated to a second temperature, higher than the first temperature.