Patents by Inventor Mihoko Nomoto

Mihoko Nomoto 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).

  • Water-absorbent or water-retention material and production method thereof
    Patent number: 6303711
    Abstract: The present invention can provide a water-absorbent or water-retention material comprising water-absorbent resin derived from monomer unit components comprising 40 to 99 wt. % of hydroxyl alkyl (meth)acrylate, 1 to 60 wt. % of (meth)acrylic acid and/or alkali metal salt thereof and 0.00001 to 3 wt. % of crosslinking agent; and a water-absorbent or water-retention material comprising water-swellable polymer which is obtained by further thermally crosslinking a particles of partially alkaline neutralized product of a copolymer of 20 to 99 mol % of acrylamide and 1 to 80 mol % of acrylic acid. The water-absorbent or water-retention material of the present invention is not readily subject to an influence of salts, and the absorbency does not deteriorate with respect to an aqueous solution containing a great amount of metallic ion of salts.
    Type: Grant
    Filed: April 10, 2000
    Date of Patent: October 16, 2001
    Assignee: Sanyo Chemical Industries, Ltd.
    Inventors: Takashi Sumiya, Masami Koike, Yoji Fujiura, Mihoko Nomoto
  • Water-absorbent or water-retention material and production method thereof
    Patent number: 6130304
    Abstract: The present invention can provide a water-absorbent or water-retention material comprising water-absorbent resin derived from monomer unit components comprising 40 to 99 wt. % of hydroxyl alkyl (meth)acrylate, 1 to 60 wt. % of (meth)acrylic acid and/or alkali metal salt thereof and 0.00001 to 3 wt. % of crosslinking agent; and a water-absorbent or water-retention material comprising water-swellable polymer which is obtained by further thermally crosslinking a particles of partially alkaline neutralized product of a copolymer of 20 to 99 mol % of acrylamide and 1 to 80 mol % of acrylic acid. The water-absorbent or water-retention material of the present invention is not readily subject to an influence of salts, and the absorbency does not deteriorate with respect to an aqueous solution containing a great amount of metallic ion of salts.
    Type: Grant
    Filed: May 13, 1997
    Date of Patent: October 10, 2000
    Assignee: Sanyo Chemical Industries, Ltd.
    Inventors: Takashi Sumiya, Masami Koike, Yoji Fujiura, Mihoko Nomoto