Patents by Inventor Takako Isomura

Takako Isomura 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).

  • Bacillus circulans KsT202 produces keratan sulfate hydrolase
    Patent number: 5968806
    Abstract: A keratan sulfate hydrolase of an endo-.beta.-N-acetylglucosaminidase type, obtained by culturing Bacillus circulans KsT202, has reactivity on keratan polysulfate at high concentrations, an optimum pH of 4.5-6, stability at a pH of 6-7, an optimum temperature of 50-60.degree. C., thermostability at a temperature of 45.degree. C., and a molecular weight of approximately 200,000 dalton.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: October 19, 1999
    Assignee: Seikagaku Corporation
    Inventors: Kiyoshi Morikawa, Hiroshi Maruyama, Takako Isomura, Kiyoshi Suzuki, Sadao Tatebayashi
  • Keratin sulfate hydrolase obtainable by using Bacillus circulans and method for producing same
    Patent number: 5840546
    Abstract: A keratan sulfate hydrolase of an endo-.beta.-N-acetylglucosaminidase type, obtained by culturing Bacillus circulans such as Bacillus circulans KsT202, has reactivity on keratan polysulfate at high concentrations, an optimum pH of 4.5-6, stability at a pH of 6-7, an optimum temperature of 50.degree.-60.degree. C., thermostability at a temperature of 45.degree. C., and a molecular weight of approximately 200,000 dalton.
    Type: Grant
    Filed: May 22, 1997
    Date of Patent: November 24, 1998
    Assignee: Seikagaku Corporation
    Inventors: Kiyoshi Morikawa, Hiroshi Maruyama, Takako Isomura, Kiyoshi Suzuki, Sadao Tatebayashi