Patents by Inventor Douglas R. Chambers

Douglas R. Chambers 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).

  • Superabsorbent polymers and products therefrom
    Patent number: 5597873
    Abstract: A surface crosslinked superabsorbent polymer composition, a process for its preparation and articles made therefrom wherein said superabsorbent composition is prepared by surface crosslinking the polymerization product of a carboxyl or carboxylate group containing monomer with a crosslinker solution comprising water, C.sub.3 -C.sub.6 diol and a crosslinking compound having at least two functional reactive groups with the carboxyl or carboxylate groups of said polymerization product.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: January 28, 1997
    Assignee: Hoechst Celanese Corporation
    Inventors: Douglas R. Chambers, William G-J Chiang, Guy T. Woodrum
  • Superabsorbent polymer having improved absorbency properties
    Patent number: 5453323
    Abstract: Super-absorbent polymers having superior dryness properties when incorporated into absorbent articles are made from acrylic acid and crosslinking agent polymerized under controlled conditions.
    Type: Grant
    Filed: June 9, 1993
    Date of Patent: September 26, 1995
    Assignee: Hoechst Celanese Corporation
    Inventors: Douglas R. Chambers, Hubert H. Fowler, Jr., Yoji Fujiura, Fusayoshi Masuda
  • Super-absorbent polymer having improved absorbency properties
    Patent number: 5145906
    Abstract: Super-absorbent polymers having superior dryness properties when incorporated into absorbent articles are made from acrylic acid and crosslinking agent polymerized under controlled conditions.
    Type: Grant
    Filed: April 15, 1991
    Date of Patent: September 8, 1992
    Assignee: Hoechst Celanese Corporation
    Inventors: Douglas R. Chambers, Hubert H. Fowler, Jr., Yoji Fujiura, Fusayoshi Masuda