Patents by Inventor Tetsuya Kawahara

Tetsuya Kawahara 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).

  • Naphthalene derivatives
    Patent number: 5237091
    Abstract: The present invention relates to a naphthalene derivative. More particularly, it relates to a naphthalene derivative exhibiting an excellent activity as a drug.
    Type: Grant
    Filed: May 29, 1992
    Date of Patent: August 17, 1993
    Assignee: Eisai Co., Ltd.
    Inventors: Hiroyuki Yoshimura, Shinya Abe, Tetsuya Kawahara, Naoyuki Shimomura, Kazuo Okano, Richard S. J. Clark, Takashi Mori, Shuhei Miyazawa, Ryoichi Hashida, Kenzo Muramoto, Koukichi Harada, Takashi Inoue, Hiroshi Shirota, Kenichi Chiba, Kenichi Kusube, Toru Horie, Takeshi Suzuki, Isao Yamatsu
  • Triazolo-1,4-diazepine derivatives and their use in pharmaceuticals
    Patent number: 5221671
    Abstract: A triazolo-1,4-di-azepine compound of the below given formulas and a pharmacologically acceptable salt thereof are disclosed and useful in the pharmaceutical field, especially to allergic diseases. ##STR1## in which R1 and R2 are hydrogen or an alkyl, R3 is hydrogen or a halogen, R4 is hydrogen or an alkyl, X is --OCO--, --NHCO--, --CO-- or others and Y is a cycloalkyl, a cycloalkylalkyl, an alkynyl or others.
    Type: Grant
    Filed: October 17, 1991
    Date of Patent: June 22, 1993
    Assignee: Eisai Co., Ltd.
    Inventors: Kazuo Okano, Shuhei Miyazawa, Richard S. J. Clark, Shinya Abe, Tetsuya Kawahara, Naoyuki Shimomura, Osamu Asano, Hiroyuki Yoshimura, Mitsuaki Miyamoto, Yoshimori Sakuma, Kenzo Muramoto, Hiroshi Obaishi, Koukichi Harada, Hajime Tsunoda, Satoshi Katayama, Kouji Yamada, Shigeru Souda, Yoshimasa Machida, Kouichi Katayama, Isao Yamatsu
  • Glycerin derivative and its pharmacological use
    Patent number: 5037827
    Abstract: A glycerin derivative having the following formula (I) or (I') and a pharmacologically acceptable salt thereof are useful to treat diseases caused by the platelet activating factor.
    Type: Grant
    Filed: June 29, 1989
    Date of Patent: August 6, 1991
    Assignee: Eisai Co., Ltd.
    Inventors: Kazuo Okano, Osamu Asano, Naoyuki Shimomura, Tetsuya Kawahara, Shinya Abe, Shuhei Miyazawa, Mitsuaki Miyamoto, Hiroyuki Yoshimura, Koukichi Harada, Junsaku Nagaoka, Tsutomu Kawata, Tsutomu Yoshimura, Hiromasa Suzuki, Shigeru Souda, Yoshimasa Machida, Kouichi Katayama, Isao Yamatsu
  • Benzothiazole derivative
    Patent number: 4929623
    Abstract: A benzothiazol compound having the formula is disclosed and is effective to inhibit the production of leukotriene. It is useful against allergy, asthma, affections of the skin, allergic rhinitis and affection of a cardiovascular system. ##STR1## in which R20 is ester or amide and --NR5R6 is amino in variety.
    Type: Grant
    Filed: June 16, 1988
    Date of Patent: May 29, 1990
    Assignee: Eisai Co., Ltd.
    Inventors: Shinya Abe, Mitsuaki Miyamoto, Masayuki Tanaka, Kozo Akasaka, Kenji Hayashi, Tetsuya Kawahara, Satoshi Katayama, Yoshinori Sakuma, Takeshi Suzuki, Isao Yamatsu