Patents by Inventor Hiromitsu Kadono

Hiromitsu Kadono 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).

  • Hydraulic cement composition
    Patent number: 4906298
    Abstract: A hydraulic cement composition comprising hydraulic cement and a copolymer of 60 to 85 mol % of an alpha,beta-unsaturated dicarboxylic acid and 40 to 15 mol % of an olefin or a water-soluble salt thereof, said copolymer having a number average molecular weight of 300 to 10,000 and containing not more than 10% by weight of a high-molecular-weight polymer having a molecular weight of at least 20,000.
    Type: Grant
    Filed: August 2, 1988
    Date of Patent: March 6, 1990
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Tadao Natsuume, Hiromitsu Kadono, Yoshiaki Miki
  • Process for producing water-soluble acid amide compounds
    Patent number: 4675359
    Abstract: A process for producing a water-soluble acid amide compound which comprises heating (a) a carboxylic acid compound having at least one carboxyl group in the molecule and being incapable of forming a 5-membered cyclic acid imide linkage and (b) a primary or secondary amine compound in an aqueous medium to introduce an acid amide linkage into the molecule.
    Type: Grant
    Filed: October 5, 1984
    Date of Patent: June 23, 1987
    Assignee: Nippon Zeon Co. Ltd.
    Inventors: Hiromitsu Kadono, Tadao Natsuume
  • Novel water-soluble copolymer
    Patent number: 4652621
    Abstract: A novel water-soluble copolymer which is characterized by being an addition copolymer comprising 5-70 mole % of (a) an N-substituted .alpha.,.beta.-unsaturated dicarboxylic acid 5-membered ring imide having a sulfo or sulfoxy group-containing residue attached to the nitrogen atom, 30-95 mole % of (b) an .alpha.,.beta.-unsaturated aliphatic monocarboxylic acid and 0-50 mole % of (c) and .alpha.,.beta.-unsaturated aliphatic dicarboxylic acid and having a number average molecular weight of 500-5,000,000, and a salt thereof.
    Type: Grant
    Filed: October 5, 1984
    Date of Patent: March 24, 1987
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Hiromitsu Kadono, Tadao Natsuume
  • Process for producing water-soluble dicarboxylic acid imide compounds
    Patent number: 4588786
    Abstract: A process for producing a water-soluble dicarboxylic acid imide compound which comprises adding a primary amine compound to an aqueous solution of a water-soluble salt of a dicarboxylic acid compound containing at least one dicarboxylic acid unit capable of forming a 5-membered cyclic acid imide linkage and heating the mixture to introduce an acid imide linkage into the molecule.
    Type: Grant
    Filed: October 5, 1984
    Date of Patent: May 13, 1986
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Hiromitsu Kadono, Tadao Natsuume