Patents by Inventor Dylan Townshend Gifford

Dylan Townshend Gifford 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).

  • Asymmetric composite membrane and a method of preparation thereof
    Patent number: 11389771
    Abstract: Asymmetric composite membranes and methods for their preparation are disclosed. The membranes comprise a cross-linked poly(vinyl alcohol) polymer coated on a film of cross-linked sulfonated poly(ether ether ketone) adhered to a sheet of hydrophilicitized microporous polyolefin. The microporous polyolefin is typically microporous poly(ethylene). The membranes have improved selectivity with the regard to the rejection of solutes in reverse osmosis and ultrafiltration applications.
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: July 19, 2022
    Assignee: HYDROXSYS HOLDINGS LIMITED
    Inventors: Lenka Benacek Craft, Mark Exley, Ashveen Vikash Nand, Dylan Townshend Gifford
  • DURABLE MEMBRANES, THEIR PREPARATION AND USE
    Publication number: 20220161204
    Abstract: Filtration membranes comprising a microporous sheet of polyolefin grafted with a poloxamer are described. In an embodiment, the poloxamer is that supplied under the trade name PLURONIC™ P-123 and the polyolefin is poly(ethylene). The membranes provide the advantage of being tolerant to the cleaning agents used in clean-in-place protocols and can be used to remove particulates from these aqueous feed streams.
    Type: Application
    Filed: February 8, 2022
    Publication date: May 26, 2022
    Inventors: Walt WHEELWRIGHT, Dylan Townshend GIFFORD, Sophie Jayne MILLS, Gordon Brett PASCOE, Chathuni Duleesha RANAWEERA
  • ASYMMETRIC COMPOSITE MEMBRANES AND HYDROPHILICITIZED MICROPOROUS SHEETS OF POLYOLEFIN USED IN THEIR PREPARATION
    Publication number: 20210016554
    Abstract: Composite membranes having a film of poly(ethenol) (polyvinyl alcohol; PVA) adhered to a microporous sheet of polyolefin are disclosed. The microporous sheet is made hydrophilic by grafting of the polyolefin, e.g. poly(ethylene), with a preformed polymer before adherence of the film of PVA. The composite membranes are chlorine tolerant with high levels of protein rejection making them particularly suitable for use in the extraction or recovery of water from feed streams in the beverage and food industries, including dairy.
    Type: Application
    Filed: October 1, 2020
    Publication date: January 21, 2021
    Inventors: Dylan Townshend Gifford, Sophie Jayne Mills, Gordon Brett Pascoe, Chathuni Duleesha Ranaweera, Walt Wheelwright