Patents by Inventor Zachary R. Dilworth

Zachary R. Dilworth 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).

  • Polymeric nanofibers and nanofibrous web
    Patent number: 10590565
    Abstract: The present invention is directed toward an apparatus comprising a high speed rotating disk or bowl for nanofiber spinning from the rotational sheared thin film fibrillation at the enclosed serrations with the optimized stretching zone to produce the defects-free nanofibrous web and nanofibrous membrane comprising a nanofiber network with a number average nanofiber diameter less than 500 nm that yield the crystallinity higher than the polymer resin used in making the web.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: March 17, 2020
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventors: Tao Huang, Thomas Patrick Daly, Zachary R Dilworth
  • Melt spun filtration media for respiratory devices and face masks
    Patent number: 10456724
    Abstract: The present disclosure is directed toward an improved nanofibrous electret filtration media of which the stand-alone electret nanofibrous web comprises a single source randomly intermingled fiber network that yields high breathability due to the high porosity and improved filtration efficiency for use as improved filtration media for respiratory devices and face masks.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: October 29, 2019
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Tao Huang, Neil Jay Croft, Jr., Zachary R. Dilworth
  • POLYMERIC NANOFIBERS AND NANOFIBROUS WEB
    Publication number: 20190161889
    Abstract: The present invention is directed toward an apparatus comprising a high speed rotating disk or bowl for nanofiber spinning from the rotational sheared thin film fibrillation at the enclosed serrations with the optimized stretching zone to produce the defects-free nanofibrous web and nanofibrous membrane comprising a nanofiber network with a number average nanofiber diameter less than 500 nm that yield the crystallinity higher than the polymer resin used in making the web.
    Type: Application
    Filed: February 1, 2019
    Publication date: May 30, 2019
    Inventors: Tao Huang, Thomas Patrick Daly, Zachary R. Dilworth
  • Apparatus for production of polymeric nanofibers
    Patent number: 10233568
    Abstract: The present invention is directed toward an apparatus comprising a high speed rotating disk or bowl for nanofiber spinning from the rotational sheared thin film fibrillation at the enclosed serrations with the optimized stretching zone to produce the defects-free nanofibrous web and nanofibrous membrane comprising a nanofiber network with a number average nanofiber diameter less than 500 nm that yield the crystallinity higher than the polymer resin used in making the web.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: March 19, 2019
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Tao Huang, Thomas Patrick Daly, Zachary R Dilworth
  • MELT SPUN FILTRATION MEDIA FOR RESPIRATORY DEVICES AND FACE MASKS
    Publication number: 20170361254
    Abstract: The present disclosure is directed toward an improved nanofibrous electret filtration media of which the stand-alone electret nanofibrous web comprises a single source randomly intermingled fiber network that yields high breathability due to the high porosity and improved filtration efficiency for use as improved filtration media for respiratory devices and face masks.
    Type: Application
    Filed: November 20, 2015
    Publication date: December 21, 2017
    Inventors: Tao Huang, Neil Jay Croft, Jr., Zachary R. Dilworth
  • APPARATUS FOR PRODUCTION OF POLYMERIC NANOFIBERS
    Publication number: 20150111455
    Abstract: The present invention is directed toward an apparatus comprising a high speed rotating disk or bowl for nanofiber spinning from the rotational sheared thin film fibrillation at the enclosed serrations with the optimized stretching zone to produce the defects-free nanofibrous web and nanofibrous membrane comprising a nanofiber network with a number average nanofiber diameter less than 500 nm that yield the crystallinity higher than the polymer resin used in making the web.
    Type: Application
    Filed: October 22, 2014
    Publication date: April 23, 2015
    Inventors: TAO HUANG, Thomas Patrick Daly, Zachary R. Dilworth
  • MELT-SPUN POLYPROPYLENE FINE-GRADE NANOFIBROUS WEB
    Publication number: 20150111456
    Abstract: The present invention is directed toward a to fine-grade stand-alone nanoweb and nanofibrous membrane comprising a nanofiber network with a number average nanofiber diameter less than 200 nm and the mean flow pore size less than 1000 nm that yield the selective barrier medium with a superior balance of flow versus barrier properties.
    Type: Application
    Filed: October 22, 2014
    Publication date: April 23, 2015
    Inventors: TAO HUANG, Thomas Patrick Daly, Zachary R. Dilworth
  • ELECTRET NANOFIBROUS WEB
    Publication number: 20150111019
    Abstract: The present invention is directed toward an electret nanofibrous web comprising a single source randomly intermingled fiber network with a range of fiber diameters that yields improved mechanical strength.
    Type: Application
    Filed: October 21, 2014
    Publication date: April 23, 2015
    Inventors: TAO HUANG, Gelnn Creighton Catlin, Jay J. Croft, Thomas Patrick Daly, Zachary R. Dilworth, Thomas William Harding, Vindhya Mishra, Carl Saquing, Wai-Shing Yung