Patents by Inventor Yukio Komazawa

Yukio Komazawa 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).

  • Anti-ulcer agent comprising chalcone derivative
    Patent number: 5234951
    Abstract: The present invention relates to an anti-ulcer agent comprising a compound represented by the following general formula I as the effective ingredient, and a novel chalcone derivative included in the compound represented by this general formula I: ##STR1## wherein X and Y independently stand for a hydrogen atom or together form a single bond, R.sub.1 stands for a hydroxyl group, an acetoxy group, a carboxymethoxy group or a methoxycarbonylmethoxy group, R.sub.2 stands for a hydrogen atom, an isoprenyl group, isopentyl group or a propyl group, R.sub.3 stands for a hydroxyl group or a methoxy group, R.sub.4 stands for a hydrogen atom, a hydroxyl group or a methoxy group, R.sub.5 stands for a hydrogen atom, a hydroxyl group, a methoxy group or an isopentyl group, R.sub.6 stands for a hydroxyl group, a methoxy group or a carboxymethoxy group, and R.sub.7 stands for a hydrogen atom or a methoxy group.
    Type: Grant
    Filed: November 25, 1991
    Date of Patent: August 10, 1993
    Assignee: Tsumura Juntendo, Inc.
    Inventors: Yukio Komazawa, Shigefumi Takeda, Kunio Hosaka, Hiroshi Mitsuhashi, Toshihiko Watanabe
  • Anti-ulcer agent comprising chalcone derivative as effective ingredient and novel chalcone derivative
    Patent number: 5106871
    Abstract: The present invention relates to an anti-ulcer agent comprising a compound represented by the following general formula I as the effective ingredient, and a novel chalcone derivative included in the compound represented by this general formula I: ##STR1## wherein X and Y independently stand for a hydrogen atom or together form a single bond, R.sub.1 stands for a hydroxyl group, an acetoxy group, a carboxymethoxy group or a methoxycarbonylmethoxy group, R.sub.2 stands for a hydrogen atom, an isoprenyl group, isopentyl group or a propyl group, R.sub.3 stands for hydroxyl group or a methoxy group, R.sub.4 stands for a hydrogen atom, a hydroxyl group or a methoxy group, R.sub.5 stands for a hydrogen atom, a hydroxyl group, a methoxy group or an isopentyl group, R.sub.6 stands for a hydroxyl group, a methoxy group or a carboxymethoxy group, and R.sub.7 stands for a hydrogen atom or a methoxy group.
    Type: Grant
    Filed: July 19, 1991
    Date of Patent: April 21, 1992
    Assignee: Tsumura & Co.
    Inventors: Yukio Komazawa, Shigefumi Takeda, Kunio Hosaka, Hiroshi Mitsuhashi, Toshihiko Watanabe