Patents by Inventor James Hemphill

James Hemphill 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).

  • Thermoplastic polyolefin blends having improved low temperature impact performance
    Patent number: 10875992
    Abstract: A composition comprising (A) from 30 wt % to 70 wt % of a propylene component including at least one propylene based polymer having a propylene content of at least 70.0 wt %, based on the total weight of the propylene based polymer, and a melt flow rate from 1.0 g/10 min to 100.0 g/10 min (ASTM D-1238 at 230° C., 2.16 kg); (B) from 1 wt % to 20 wt % of an ethylene component including at least one ethylene based polymer having an ethylene content of at least 85.0 wt %, based on the total weight of the ethylene based polymer, and a melt index from 0.1 g/10 min to 50.0 g/10 min (ASTM D-1238 at 190° C., 2.16 kg); (C) from 1 wt % to 40 wt % of an olefin block copolymer; and at least one of (D) from 1 wt % to 40 wt % of a polyolefin elastomer and (E) from 1 wt % to 30 wt % of a filler.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: December 29, 2020
    Assignee: Dow Global Technologies LLC
    Inventors: Hang Wu, Wei Li, Yushan Hu, Jeffrey C. Munro, James Hemphill
  • Underwater cable repair habitat
    Patent number: 10777990
    Abstract: A submersible habitat chamber providing a contained environment for repairing subsea cable is provided. The habitat chamber includes first and second shell parts assembled to at least partly define the contained environment, a first seal provided between the first and second shell parts, a cable seal provided for engagement with the cable, and at least one access port through at least one of the shell parts to allow a user to access the contained environment from outside the habitat. A method of using the habitat chamber and a kit for assembly of the chamber are also provided.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: September 15, 2020
    Assignee: MOYLE INTERCONNECTOR LIMITED
    Inventors: Stephen James Hemphill, Michael John McGuckin, Maurice Patrick Smith, Gerard Joseph Rathborne, Patrick James O'Rourke
  • Thermoplastic Polyolefin Blends Having Improved Low Temperature Impact Performance
    Publication number: 20190136026
    Abstract: A composition comprising (A) from 30 wt % to 70 wt % of a propylene component including at least one propylene based polymer having a propylene content of at least 70.0 wt %, based on the total weight of the propylene based polymer, and a melt flow rate from 1.0 g/10 min to 100.0 g/10 min (ASTM D-1238 at 230° C., 2.16 kg); (B) from 1 wt % to 20 wt % of an ethylene component including at least one ethylene based polymer having an ethylene content of at least 85.0 wt %, based on the total weight of the ethylene based polymer, and a melt index from 0.1 g/10 min to 50.0 g/10 min (ASTM D-1238 at 190° C., 2.16 kg); (C) from 1 wt % to 40 wt % of an olefin block copolymer; and at least one of (D) from 1 wt % to 40 wt % of a polyolefin elastomer and (E) from 1 wt % to 30 wt % of a filler.
    Type: Application
    Filed: May 31, 2016
    Publication date: May 9, 2019
    Inventors: Hang Wu, Wei Li, Yushan Hu, Jeffrey C. Munro, James Hemphill