Patents by Inventor Mark Spak

Mark Spak 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).

  • Aqueous edge bead remover
    Publication number: 20050282093
    Abstract: The present invention relates to an aqueous based edge bead remover.
    Type: Application
    Filed: June 16, 2004
    Publication date: December 22, 2005
    Inventors: Ralph Dammel, Stephen Meyer, Mark Spak
  • High performance pan composite membranes
    Patent number: 5324430
    Abstract: A composite fiber or film for use in a fluid separation membrane made of PAN coated with an intermediate permeable material and further coated with a selective layer. The PAN fiber or film is pre-wet with perfluoroether prior to being coated with the intermediate material, to produce a membrane material having enhanced permeability. The selective layer produces a high separation factor.
    Type: Grant
    Filed: March 3, 1993
    Date of Patent: June 28, 1994
    Assignee: Hoechst Celanese Corp.
    Inventors: Tai-Shung Chung, E. Ronald Kafchinski, Mark Spak, Brenda Bembry-Ross, C. Glen Wensley