Sep 16, 2019 | Press Release
Proppant Express Investments Prevails in Patent Trial and Appeal Board Ruling Resulting in Invalidation of SandBox Logistics Patent Claims DENVER, COLORADO, September 16, 2019 Proppant Express Investments, LLC (PropX) today announced that the United States Patent and...
Feb 18, 2019 | Press Release
Proppant Express Investments Prevails Again by Invalidating 24 SandBox Logistics Patent Claims DENVER, COLORADO, February 18, 2019 Proppant Express Investments, LLC (“PropX”) today announced that on February 14, 2019 the U.S. Patent and Trademark Office...