Patents by Inventor Chiharu Nakagawa

Chiharu Nakagawa 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).

  • Fused purine derivatives
    Patent number: 7005430
    Abstract: A condensed purine derivative represented by Formula (I): wherein X—Y-Z represents R1N—C?O or N?C—W, R2 represents a hydrogen atom, a substituted or unsubstituted lower alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted alicyclic heterocyclic group or the like, n represents an integer of from 0 to 3, V1 represents a hydrogen atom, a substituted or unsubstituted lower alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aromatic heterocyclic group, V2 represents a substituted lower alkyl group or a substituted or unsubstituted aromatic heterocyclic group, and when V1 represents a hydrogen atom, a lower alkyl group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted aryl group, and for example, X—Y-Z represents R1aN—C?O and R2 represents a substituted lower
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: February 28, 2006
    Assignee: Kyowa Hakko Kogyo Co., Ltd.
    Inventors: Kimihisa Ueno, Akira Ogawa, Yoshihisa Ohta, Yuji Nomoto, Kotaro Takasaki, Hideaki Kusaka, Hiroshi Yano, Chiharu Nakagawa, Satoshi Nakanishi
  • Fused purine derivatives
    Publication number: 20030176698
    Abstract: A condensed purine derivative represented by Formula (I): 1
    Type: Application
    Filed: October 22, 2002
    Publication date: September 18, 2003
    Inventors: Kimihisa Ueno, Akira Ogawa, Yoshihisa Ohta, Yuji Nomoto, Kotaro Takasaki, Hideaki Kusaka, Hiroshi Yano, Chiharu Nakagawa, Satoshi Nakanishi