Patents by Inventor Jeffrey E. TOWNLEY

Jeffrey E. TOWNLEY 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).

  • Ion-exchange membranes, filters, and methods
    Patent number: 11918990
    Abstract: Described are ion-exchange membranes that include a porous polymeric membrane and imidazole ion-exchange groups at surfaces of the membrane; ion-exchange membranes and filters that contain the ion-exchange membranes; and methods of using the ion-exchange membranes and filters for separating charged biological molecule from a liquid.
    Type: Grant
    Filed: June 17, 2021
    Date of Patent: March 5, 2024
    Assignee: ENTEGRIS, INC.
    Inventors: Maybelle Woo, Jad A. Jaber, Saksatha Ly, Jeffrey E. Townley, James Hamzik, Justin Brewster
  • Highly retentive polyamide hollow fiber membranes produced via controlled shrinkage
    Patent number: 11890582
    Abstract: Described herein is a polyamide hollow fiber membrane and methods of making and using the hollow fiber membrane. The polyamide hollow fiber membrane has an isopropanol permeability of from about 5 L/m2 h bar to about 150 L/m2 h bar and a particle rejection percentage of about 100% for particles having a nominal diameter of from about 1 nm to about 25 nm. The polyamide hollow fiber membranes described herein are particularly useful for photoresist filtration, for example.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: February 6, 2024
    Assignee: ENTEGRIS, INC.
    Inventors: Maybelle Woo, Jeffrey E. Townley, Kwok-Shun Cheng
  • DEPTH FILTERS AND RELATED METHODS
    Publication number: 20230120229
    Abstract: Described are multi-layer filters of a type commonly known as “depth filters” and related devices and methods, with the filters containing a layer that includes polyaramid fiber, synthetic filter aid, and polymeric binder.
    Type: Application
    Filed: October 14, 2022
    Publication date: April 20, 2023
    Inventors: Maybelle Woo, Jeffrey E. Townley
  • ION-EXCHANGE MEMBRANES, FILTERS, AND METHODS
    Publication number: 20210394169
    Abstract: Described are ion-exchange membranes that include a porous polymeric membrane and imidazole ion-exchange groups at surfaces of the membrane; ion-exchange membranes and filters that contain the ion-exchange membranes; and methods of using the ion-exchange membranes and filters for separating charged biological molecule from a liquid.
    Type: Application
    Filed: June 17, 2021
    Publication date: December 23, 2021
    Inventors: Maybelle WOO, Jad A. JABER, Saksatha LY, Jeffrey E. TOWNLEY, James HAMZIK, Justin BREWSTER
  • HIGHLY RETENTIVE POLYAMIDE HOLLOW FIBER MEMBRANES PRODUCED VIA CONTROLLED SHRINKAGE
    Publication number: 20190255489
    Abstract: Described herein is a polyamide hollow fiber membrane and methods of making and using the hollow fiber membrane. The polyamide hollow fiber membrane has an isopropanol permeability of from about 5 L/m2 h bar to about 150 L/m2 h bar and a particle rejection percentage of about 100% for particles having a nominal diameter of from about 1 nm to about 25 nm. The polyamide hollow fiber membranes described herein are particularly useful for photoresist filtration, for example.
    Type: Application
    Filed: June 26, 2017
    Publication date: August 22, 2019
    Inventors: Maybelle WOO, Jeffrey E. TOWNLEY, Kwok-Shun CHENG