Patents by Inventor Logan E. Shephard

Logan E. Shephard 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).

  • Methods to produce heterogeneous polyethylene granules
    Patent number: 11492428
    Abstract: Methods to produce heterogeneous polyethylene granules, the method including: contacting first olefin monomers and second olefin monomers with a catalyst system in a single reaction zone to produce heterogeneous polyethylene granules and recovering the heterogeneous polyethylene granules; wherein the catalyst system includes a product of a combination including: one or more catalysts having a Group 3 through Group 12 metal atom or lanthanide metal atom; at least one activator; and optionally, one or more support material compositions; and wherein the heterogeneous polyethylene granules include a product of a combination of: a first portion comprising a first polyethylene including the first olefin monomers and the second olefin monomers; a second portion including a second polyethylene including the first monomers and the second monomers; and wherein the first polyethylene has a higher second monomer weight percent than the second polyethylene, are provided.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: November 8, 2022
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Xuan Ye, Jonathan J. Schaefer, Timothy M. Boller, Christopher S. Breiner, Chi-I Kuo, Kevin A. Stevens, Logan E. Shephard, Eyerusalem H. Mamo, Evan J. Morris, Shamah Lloyd
  • Methods to Produce Heterogeneous Polyethylene Granules
    Publication number: 20190389988
    Abstract: Methods to produce heterogeneous polyethylene granules, the method including: contacting first olefin monomers and second olefin monomers with a catalyst system in a single reaction zone to produce heterogeneous polyethylene granules and recovering the heterogeneous polyethylene granules; wherein the catalyst system includes a product of a combination including: one or more catalysts having a Group 3 through Group 12 metal atom or lanthanide metal atom; at least one activator; and optionally, one or more support material compositions; and wherein the heterogeneous polyethylene granules include a product of a combination of: a first portion comprising a first polyethylene including the first olefin monomers and the second olefin monomers; a second portion including a second polyethylene including the first monomers and the second monomers; and wherein the first polyethylene has a higher second monomer weight percent than the second polyethylene, are provided.
    Type: Application
    Filed: June 21, 2019
    Publication date: December 26, 2019
    Inventors: Xuan Ye, Jonathan J. Schaefer, Timothy M. Boller, Christopher S. Breiner, Chi-I Kuo, Kevin A. Stevens, Logan E. Shephard, Eyerusalem H. Mamo, Evan J. Morris, Shamah Lloyd