Patents by Inventor Ichiro Washizawa

Ichiro Washizawa 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).

  • Polysaccharide PS-A obtained from barrenwort deriving from plants belonging to the genus Epimedium, process for preparation thereof and phylactic and immunostimulating agents comprising said polysaccharide PS-A effective component
    Patent number: 4528188
    Abstract: A polysaccharide PS-A obtained from plants belonging to the genus Epimedium and having the following physicochemical properties, a process for preparation thereof and use as phylactic and immunostimulating agents comprising the polysaccharide PS-A as an effective component:1. Elementary analysis: C=40.92; H=6.17; Ash=very small;2. Molecular weight: 75,000.+-.25,000 (average molecular weight);3. Decomposition point: 205.degree. C.;4. pH: 7.0 (solution of 100 mg of PS-A in 50 ml of water);5. Specific rotatory power: [.alpha.].sub.D.sup.19 =-23.6.degree. (in H.sub.2 O, c=0.527);6. Infrared absorption spectrum: .nu..sub.max.sup.KBr (cm.sup.-1)/3400, 2900, 1620, 1400, 1230, 1060;7. Ultraviolet absorption spectrum: Maximum absorption is not recognized in the range of 240-400 nm.;8. Outward form: White or faint brown, amorphous powder;9. Solubility:(a) Soluble in water;(b) Insoluble in methanol, ethanol, acetone, ethyl acetate, diethyl ether, hexane and chloroform;10.
    Type: Grant
    Filed: December 30, 1982
    Date of Patent: July 9, 1985
    Assignee: Zenyaku Kogyo Kabushiki Kaisha
    Inventors: Susumu Mitsuhashi, Muneaki Takase, Sosuke Yasui, Ichiro Washizawa, Kimitomo Yoshioka
  • Extract from barrenwort
    Patent number: 4501736
    Abstract: The present invention provides an extract obtained by extracting a plant belonging to the genus Epimedium sp. with a mixed solvent of water and a water-miscible organic solvent or with water, defatting the obtained aqueous extract and collecting a high-molecular compounds-containing fraction from the defatted aqueous extract, a process for preparation of this extract, an antibacterial agent comprising this extract as an effective component and an antibacterial therapy by using this extract.
    Type: Grant
    Filed: August 8, 1983
    Date of Patent: February 26, 1985
    Assignee: Zenyaku Kogyo Kabushiki Kaisha
    Inventors: Susumu Mitsuhashi, Muneaki Takase, Sosuke Yasui, Ichiro Washizawa, Kimitomo Yoshioka