Patents by Inventor Hidenori Nozawa

Hidenori Nozawa 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).

  • Modified phenolic hydroxyl-containing resin by reacting epoxy resin with difunctional phenol
    Patent number: 6569959
    Abstract: A modified phenolic hydroxyl-containing resin having a low free difunctional phenol content and represented by general formula (1); a solid epoxy resin having an epoxy equivalent of 450 to 2,500 g/eq and prepared by epoxidizing the above resin; and another solid epoxy resin having an epoxy equivalent of 1,500 to 60,000 g/eq and a number-average molecular weight of 3,000 to 15,000 and prepared by reacting the above epoxy resin with a difunctional phenol compound. Resin compositions containing these resins have many applications as powder coatings and can paints. In formula (1), X represents a residue of a difunctional phenol compounds; X's may be the same or different; and n is the number of repeating units and is an integer of 0 or above.
    Type: Grant
    Filed: October 19, 1999
    Date of Patent: May 27, 2003
    Assignee: Tohto Kasei Co., Ltd.
    Inventors: Shuya Shinohara, Nobuhisa Saitoh, Yasuyuki Takeda, Masayoshi Hanafusa, Hidenori Nozawa
  • Phenolic hydroxyl-containing resin by reacting epoxy resin with excess difunctional phenol and epoxidation thereof
    Patent number: 6046284
    Abstract: A modified phenolic hydroxyl-containing resin having a low free difunctional phenol content and represented by general formula (1); a solid epoxy resin having an epoxy equivalent of 450 to 2,500 g/eq and prepared by epoxidizing the above resin; and another solid epoxy resin having an epoxy equivalent of 1,500 to 60,000 g/eq and a number-average molecular weight of 3,000 to 15,000 and prepared by reacting the above epoxy resin with a difunctional phenol compound. Resin compositions containing these resins have many applications as powder coatings and can paints. In formula (1), X represents a residue of a difunctional phenol compounds; X's may be the same or different; and n is the number of repeating units and is an integer of 0 or above.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: April 4, 2000
    Assignee: Tohto Kasei Co Ltd
    Inventors: Shuya Shinohara, Nobuhisa Saitoh, Yasuyuki Takeda, Masayoshi Hanafusa, Hidenori Nozawa