Patents by Inventor Rena Kawase

Rena Kawase 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).

  • Physiologically active substances
    Patent number: 6645996
    Abstract: The present invention provides a novel bioactive substance having an antiangiogenic effect. The chemical compound represented by the formula (1) (wherein, R1 represents hydrogen atom, aldehyde group or a lower acyl group, R2 and R3 are the same as or different from each other and represent hydrogen atom or a lower alkoxy group or are combined to represent oxygen atom, R4 represents a lower alkyl group and R5 represents hydrogen atom or a lower alkyl group, provided that compounds in which R1 is aldehyde group, R2 and R3are different from each other and are hydrogen atom or methoxy group, R4 is ethyl group and R5 is hydrogen atom are excluded), a salt thereof or a hydrate thereof was isolated from the culture broth of genus Streptomyces and the structure thereof was analyzed.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: November 11, 2003
    Assignee: Mercian Corporation and Eisai Co., Ltd.
    Inventors: Toshiaki Wakabayashi, Rena Kawase, Nobuaki Naruse, Masanori Fujita, Tomohiro Sameshima, Yoshio Watanabe, Kazuyuki Dobashi, Yasuhiro Funahashi, Taro Semba