Patents by Inventor Saeko Takahashi

Saeko Takahashi 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).

  • Novel antibiotic BN-235 substance, and process for the production thereof
    Patent number: 4298599
    Abstract: A novel antibiotic BN-235 substance and a process for making it are described, wherein the hydrochloride thereof has the following properties:Elemental analysis values:carbon 55.44%hydrogen 6.41%nitrogen 9.02%chlorine 12.01%oxygen 17.12% (balance)Molecular weight: about 520 (by the vapor pressure method)Melting point: 230.degree. to 232.degree. C. (decomp.)Ultraviolet absorption spectrum: shown in FIG. 1Infrared absorption spectrum: shown in FIG. 2Color reactions:Positive: ninhydrin and LemieuxNegative: Sakaguchi and ferric chlorideColor and form: yellow powderSolubility: soluble in methanol, ethanol, acetone and water, and insoluble in ether, n-hexane and petroleum etherStability: stable at a pH of 2 to 6Rf values in thin-layer chromatography (silica gel):chloroform-methanol (4:1) 0.73n-butanol-acetic acid-water (2:1:1) 0.64Distinction among acidity, neutrality and basicity:basic.
    Type: Grant
    Filed: September 12, 1980
    Date of Patent: November 3, 1981
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Shoichi Amano, Shinji Miyadoh, Saeko Takahashi, Norio Ezaki, Tomizo Niwa, Yujiro Yamada