Patents Assigned to PREFFERRED TECHNOLOGY, LLC
  • Durable coatings and uses thereof
    Patent number: 10696896
    Abstract: Coatings and compositions for coating particulates are described that can be used as, for example, as proppants to, for example, extract oil and gas from subterranean formations. The coatings can be, for example, an inner coating adjacent to the particulate comprising a polyurethane and an outer coating comprising an polyurethane dispersion; a coating comprising a polyurethane admixed with a polyurethane dispersion; or a polyurethane dispersion layer and is free of an inner polyurethane layer.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: June 30, 2020
    Assignee: PREFFERRED TECHNOLOGY, LLC
    Inventors: Spyridon Monastiriotis, Yu-Chin Li