Patents by Inventor David Sam Germack

David Sam Germack has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Oil-based slurries and methods for making
    Patent number: 11292958
    Abstract: An oil-based slurry composition comprising hydratable (water-soluble) materials with improved settling properties is disclosed with the addition of a suspending agent to the slurry mixture. The suspending agent is a styrenic diblock copolymer of formula A-B. The styrenic diblock copolymer is a hydrogenated styrene-(ethylene/propylene) (S-EP) block copolymer having a molecular weight of 175-225 kg/mole and a polystyrene (PSC) content of 30-50%. The block copolymer maintains the water-soluble materials in suspension in the mixture with less than 3 wt. % free hydrocarbon solvent separation after at least 1 day standing.
    Type: Grant
    Filed: January 7, 2021
    Date of Patent: April 5, 2022
    Assignee: KRATON POLYMERS LLC
    Inventors: Robert C Bening, Steven Huynh, David Sam Germack