Patents by Inventor Katsushi Ijichi

Katsushi Ijichi 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).

  • Arylthiadiazole derivative and antiviral agent containing the same
    Patent number: 5948916
    Abstract: Novel arylthiadiazole derivatives and salts thereof useful for preventing and treating human viral infection and a novel virucide which contains the arylthiadiazole derivative or a salt thereof are provided. N,N-dimethyl ?3-(3-(amino-2,6-dichlorophenyl)-1,2,5-thiadiazol-4-yl! carbamate or its salt, and virucide containing the same as an effective component.
    Type: Grant
    Filed: June 9, 1997
    Date of Patent: September 7, 1999
    Assignee: Rational Drug Design Laboratories
    Inventors: Katsushi Ijichi, Shiro Shigeta, Masanori Baba, Masatoshi Fujiwara, Tomoyuki Yokota, Hiromitsu Takayama, Shin-ichiro Sakai, Yasuaki Hanasaki, Teruhiko Ide, Hiroyuki Watanabe, Kimio Katsuura
  • 1-.beta.-D-arabinofuranosyl-(E)-5-(2-halogenovinyl)uracil derivatives
    Patent number: 5446031
    Abstract: The present invention relates to a novel 1-.beta.-D-arabinofuranosyl-(E)-5-(2-halogenovinyl)uracil derivative represented by the following formula (I), whose concentration in blood as XVAU can be kept high for many hours when it is administered orally.The present invention also relates to an antiviral agent comprising as an active ingredient the compound of the present invention.Further, the present invention relates to a method for treating viral diseases which comprises administering to a patient with a viral disease a safe and effective amount of the compound of the present invention. ##STR1## wherein X represents a halogen; and R.sup.1, R.sup.2, and R.sup.3, which may be the same or different, each represent a hydrogen atom, a lower alkyl group or an aralkyl group, provided that R.sup.1, R.sup.2 and R.sup.3 are not hydrogen at the same time.
    Type: Grant
    Filed: October 27, 1994
    Date of Patent: August 29, 1995
    Assignee: Yamasa Shuyu Kabushiki Kaisha
    Inventors: Shinji Sakata, Haruhiko Machida, Katsushi Ijichi, Fumitaka Kano