Patents by Inventor Hitoshi Kawakami

Hitoshi Kawakami 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).

  • Polyol polymers, meso-erythritol polymers and their aliphatic acid esters and aliphatic ethers
    Patent number: 6838544
    Abstract: A polyol polymer having a greater number of hydroxy groups, an aliphatic acid ester of a polyol polymer having a greater number of hydroxy groups, and an aliphatic ether of a polyol polymer having a greater number of hydroxy groups are provided. A polymer obtained by polymerizing a polyol containing meso-erythritol, and an aliphatic acid ester and an aliphatic ether of the polymer are provided.
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: January 4, 2005
    Assignee: Rengo Co., Ltd.
    Inventors: Ge Li, Takahito Otani, Hiro mi Fujita, Hirokuni Tajima, Hitoshi Kawakami
  • Polyol polymers, meso-erythritol polymers and their aliphatic acid esters and aliphatic ethers
    Publication number: 20030017132
    Abstract: A polyol polymer having a greater number of hydroxy groups, an aliphatic acid ester of a polyol polymer having a greater number of hydroxy groups, and an aliphatic ether of a polyol polymer having a greater number of hydroxy groups are provided. A polymer obtained by polymerizing a polyol containing meso-erythritol, and an aliphatic acid ester and an aliphatic ether of the polymer are provided.
    Type: Application
    Filed: June 6, 2002
    Publication date: January 23, 2003
    Inventors: Ge Li, Takahito Otani, Hiro mi Fujita, Hirokuni Tajima, Hitoshi Kawakami