Patents by Inventor James A. Ward

James A. Ward 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).

  • Ionene polymers containing biologically-active anions
    Patent number: 5575993
    Abstract: Ionene polymers having biologically-active organic and/or inorganic anions are described. Methods to prepare the ionene polymers, compositions containing them and their methods of use are also described.
    Type: Grant
    Filed: August 31, 1994
    Date of Patent: November 19, 1996
    Assignee: Buckman Laboratories International, Inc.
    Inventors: James A. Ward, Fernando Del Corral
  • Polyelectrolyte hydrogels and methods of their preparation
    Patent number: 4192727
    Abstract: A predetermined mass comprising an acrylate salt and acrylamide is exposed to a controlled intensity and dose of ionizing radiation effecting simultaneous cross-linking and polymerization thereof to form a polyelectrolyte hydrogel. The resulting hydrogel is an insoluble hydrophilic copolymer which can contain or when dried absorb large quantities of aqueous fluids.
    Type: Grant
    Filed: August 3, 1977
    Date of Patent: March 11, 1980
    Assignee: Union Carbide Corporation
    Inventor: James A. Ward