Proppant Express Investments Prevails in U.S. Court of Appeals for Federal Circuit: PropX Did Not Infringe on SandBox Logistics Intellectual Property, Upholding Federal District Court Ruling

DENVER, May 20, 2020 (GLOBE NEWSWIRE) -- Proppant Express Investments, LLC (“PropX” or the “Company”), a leader in providing last-mile sand logistics to the energy industry,  today announced that the United States Court of Appeals for the Federal Circuit upheld the decision of the United States District Court for the Southern District of Texas that PropX did not infringe on any of the patents asserted by SandBox Logistics, LLC (“SandBox”)  in a 2017 lawsuit.  SandBox is a subsidiary of U.S. Silica Holdings, Inc. (NYSE:SLCA).

“The decision of the appellate court affirming the trial court’s ruling again confirms our position that PropX equipment and technology do not and at no time have ever infringed upon SandBox’s intellectual property,” said Kevin Fisher, Chief Executive Officer of PropX. “Combined with rulings by the U.S. Patent and Trademark Office which have invalidated a plethora of SandBox patent  claims, we are confident that our unique, efficient and market leading technology will remain at the forefront of sand logistics technology for the energy industry.  We are pleased that the appellate court affirmed the trial court’s ruling.”

The appellate case citation for the appeal is Sandbox Logistics, LLC, et. al. v. Proppant Express Investments, LLC, et. al., No. 2019-1684, 2020 U.S. App. (Fed.Cir., May 18, 2020).  For the related District Court opinion see Sandbox Logistics LLC v. Grit Energy Sols. LLC, Nos. 3:16-CV-12, 4:17-CV-589, 2018 WL 3344773 at 2-17(S.D. Tex. July 9, 2018).  

About Proppant Express Investments, LLC

PropX provides last mile sand logistics through its innovative mobile container and delivery system design and best-in-class customer service. The PropX last mile delivery system significantly reduces the cost of proppant delivery for each well and reduces the environmental impact of sand injection at the wellhead when compared to traditional and other delivery methods. Founded in 2016, PropX has quickly become a market leader in last mile sand logistics focused on providing the customer with the most efficient method of transporting proppant from mine or transload to well site. Visit PropX at

Proppant Express Investments, LLC
950 17th Street, Suite 1350
Denver, CO 80202
(303) 317-8950