Patents Assigned to Celanese EVA Performance Polymers LLC
  • Patent number: 11951215
    Abstract: An implantable device for delivery of a macromolecular drug compound is provided. The device comprises a core having an outer surface and a membrane layer positioned adjacent to the outer surface of the core. The core comprises a core polymer matrix within which is dispersed a drug compound having a molecular weight of about 0.5 kDa or more, the polymer matrix containing a hydrophobic polymer. Further, the membrane layer comprises a membrane polymer matrix within which the macromolecular drug compound is optionally dispersed. The concentration of the macromolecular drug compound in the core is greater than the concentration of the macromolecular drug compound in the membrane layer.
    Type: Grant
    Filed: May 11, 2023
    Date of Patent: April 9, 2024
    Assignee: Celanese EVA Performance Polymers LLC
    Inventor: Christian Schneider
  • Patent number: 11690807
    Abstract: An implantable device for delivery of a macromolecular drug compound is provided. The device comprises a core having an outer surface and a membrane layer positioned adjacent to the outer surface of the core. The core comprises a core polymer matrix within which is dispersed a drug compound having a molecular weight of about 0.5 kDa or more, the polymer matrix containing a hydrophobic polymer. Further, the membrane layer comprises a membrane polymer matrix within which the macromolecular drug compound is optionally dispersed. The concentration of the macromolecular drug compound in the core is greater than the concentration of the macromolecular drug compound in the membrane layer.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: July 4, 2023
    Assignee: Celanese EVA Performance Polymers LLC
    Inventor: Christian Schneider
  • Patent number: 11690806
    Abstract: An implantable device for delivery of a macromolecular drug compound is provided. The device comprises a core having an outer surface and a membrane layer positioned adjacent to the outer surface of the core. The core comprises a core polymer matrix within which is dispersed a drug compound having a molecular weight of about 0.5 kDa or more, the polymer matrix containing a hydrophobic polymer. Further, the membrane layer comprises a membrane polymer matrix within which the macromolecular drug compound is optionally dispersed. The membrane polymer matrix contains a hydrophobic polymer in combination with a hydrophilic compound, and the weight ratio of the hydrophobic polymer to the hydrophilic compound within the membrane polymer matrix ranges from about 0.25 to about 200.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: July 4, 2023
    Assignee: Celanese EVA Performance Polymers LLC
    Inventor: Christian Schneider
  • Patent number: 11352486
    Abstract: A polymer composition that comprises an olefinic polymer, a flame retardant that includes a halogen-free mineral filler, and a compatibilizing agent is provided. The halogen-free mineral filler constitutes from about 20 wt. % to about 80 wt. % of the composition. The composition may exhibit a degree of water uptake of about 5 wt. % or less after being immersed in water for seven days at a temperature of 23° C.
    Type: Grant
    Filed: August 24, 2020
    Date of Patent: June 7, 2022
    Assignee: Celanese EVA Performance Polymers LLC
    Inventors: Jeffrey Charles Haley, Nagarjuna Palyam, Christian Schneider, Chelsea Ringham