Patents by Inventor Kanzi Katsuragawa

Kanzi Katsuragawa 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).

  • Process for brominating side chain of m-phenoxytoluene
    Patent number: 4393246
    Abstract: A side chain of m-phenoxytoluene is brominated with a polyhalogenated ethane having the formula ##STR1## wherein W and Z respectively represent Cl or Br and X and Y respectively represent Cl, Br or H, as a brominating agent in a liquid phase in the presence of an amorphous carbon.
    Type: Grant
    Filed: October 29, 1981
    Date of Patent: July 12, 1983
    Assignee: Toyo Soda Manufacturing Co., Ltd.
    Inventors: Masashige Kubo, Mitsuaki Yoshimitsu, Kanzi Katsuragawa
  • Bromination of side chain of m-phenoxytoluene
    Patent number: 4302306
    Abstract: A process for brominating m-phenoxytoluene with a polyhaloethane having the formula ##STR1## wherein W and Z respectively represent Cl or Br and X and Y respectively represent Cl, Br or H in a liquid phase.
    Type: Grant
    Filed: April 18, 1980
    Date of Patent: November 24, 1981
    Assignee: Toyo Soda Manufacturing Co., Ltd.
    Inventors: Kanzi Katsuragawa, Hideo Sakka, Keiichi Kihara
  • Process for producing ammonium p-styrenesulfonate
    Patent number: 4115436
    Abstract: Ammonium p-styrenesulfonate is produced in a process which comprises reacting an amine having more than 7 carbon atoms and a mineral acid with an alkali metal p-styrenesulfonate in an aqueous media to produce an amine salt of p-styrenesulfonic acid and then reacting ammonia with said amine salt.
    Type: Grant
    Filed: July 8, 1977
    Date of Patent: September 19, 1978
    Assignee: Toyo Soda Manufacturing Co., Ltd.
    Inventors: Kanzi Katsuragawa, Tatsuo Hattori, Keiichi Kihara, Hanzo Tamabayashi
  • Process for producing ammonium p-styrenesulfonate
    Patent number: 4061669
    Abstract: Ammonium p-styrenesulfonate is produced in a process which comprises reacting an amine having more than 7 carbon atoms and a mineral acid with an alkali metal p-styrenesulfonate in an aqueous media to produce an amine salt of p-styrenesulfonic acid and then reacting ammonia with said amine salt.
    Type: Grant
    Filed: August 28, 1975
    Date of Patent: December 6, 1977
    Assignee: Toyo Soda Manufacturing Co., Ltd.
    Inventors: Kanzi Katsuragawa, Tatsuo Hattori, Keiichi Kihara, Hanzo Tamabayashi
  • Process for producing ammonium aromatic sulfonate
    Patent number: 4029640
    Abstract: A process for producing an ammonium p-styrenesulfonate or polymer thereof which comprisesReacting an alkali metal p-styrenesulfonate or a polymer thereof with an inorganic ammonium salt in a medium of a hydrophilic alcohol, or a mixture of a hydrophilic organic solvent and water.
    Type: Grant
    Filed: May 27, 1975
    Date of Patent: June 14, 1977
    Assignee: Toyo Soda Manufacturing Co., Ltd.
    Inventors: Tatsuo Hattori, Kanzi Katsuragawa, Keiichi Kihara, Isao Ono, Hanzo Tamabayashi