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:
Dec. 01, 2020
Filed:
Feb. 12, 2020
Applicant:
Covestro Llc, Pittsburgh, PA (US);
Inventors:
Stephen J. Harasin, Morgan, PA (US);
Kenneth R. Riddle, Ambridge, PA (US);
Michael T. Wellman, Moundsville, WV (US);
Assignee:
Covestro LLC, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/80 (2006.01); C09D 175/06 (2006.01); E21B 43/267 (2006.01); E21B 43/26 (2006.01); C08G 18/66 (2006.01); C08L 75/04 (2006.01); C08G 18/24 (2006.01); C08G 18/76 (2006.01); C08G 18/28 (2006.01); C08G 18/78 (2006.01); C08G 18/32 (2006.01); C08G 18/42 (2006.01); C09K 8/62 (2006.01);
U.S. Cl.
CPC ...
C09K 8/805 (2013.01); C08G 18/246 (2013.01); C08G 18/289 (2013.01); C08G 18/6651 (2013.01); C08G 18/7671 (2013.01); C08G 18/7843 (2013.01); C08L 75/04 (2013.01); C09D 175/06 (2013.01); E21B 43/26 (2013.01); E21B 43/267 (2013.01); C08G 18/3237 (2013.01); C08G 18/4288 (2013.01); C08G 18/7664 (2013.01); C09K 8/62 (2013.01);
Abstract
Disclosed are coated particles. The coated particles include substrate particles and a coating disposed over at least a portion of the substrate particles. The coating includes a condensation reaction product of a reaction mixture that includes a liquid isocyanate-functional component and an isocyanate-reactive composition. Also disclosed are methods for making such particles and methods for using such particles as proppants in hydraulic fracturing.