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:
Feb. 20, 2018
Filed:
Feb. 18, 2016
Applicant:
Covestro Llc, Pittsburgh, PA (US);
Inventors:
David P. Zielinski, Wexford, PA (US);
Emery Yuhas, Greensburg, PA (US);
Yanan Chen, Pittsburgh, PA (US);
Derick Henderson, Crafton, PA (US);
Mark Connor, Coraopolis, PA (US);
Assignee:
Covestro LLC, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/80 (2006.01); B05D 7/00 (2006.01); E21B 43/267 (2006.01);
U.S. Cl.
CPC ...
C09K 8/805 (2013.01); B05D 7/00 (2013.01); E21B 43/267 (2013.01);
Abstract
The present invention provides for coating proppants, such as sand, with a resin-containing dispersion which dramatically reduces the dust generated during handling, for example in hydraulic fracturing, by protecting the surface of the particle from abrasion and degradation. Such resin-containing dispersion coated-sand may also reduce the wear on metal parts used in transporting such proppants.