Patents by Inventor Akira Ohnishi

Akira Ohnishi 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).

  • Treating agent useful for fibrous materials and preparation thereof
    Patent number: 3976824
    Abstract: Amide-containing cationic copolymer is reacted with polyalkyleneimine in an aqueous medium to form a water-soluble cationic resin which is a treating agent useful for fibrous materials. The adduct of halohydrin to water-soluble cationic resin is a water-soluble cationic thermosetting resin and is also useful for treating fibrous materials. The treating agent has excellent retention ability to fiber, drainage property and storage stability and remarkably improves the retention of fillers and wet and dry strength of paper.
    Type: Grant
    Filed: June 3, 1975
    Date of Patent: August 24, 1976
    Assignee: Arakawa Rinsan Kagaku Kogyo Kabushiki Kaisha
    Inventors: Junji Ariyoshi, Akira Ohnishi, Hiromi Toda, Kametaro Kunimori, Mitsuyoshi Nakao