Patents by Inventor Hidehisa Hamasaki

Hidehisa Hamasaki 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).

  • Patent number: 6291485
    Abstract: 4,5-Dihydro-[1H]-benz[g]indazole-3-carboxylic acid derivatives represented by the following formula, or their salts, have excellent antagonism to endothelin receptors and are useful as preventives or remedies for diseases such as hypertension, angina pectoris, myocardial infarction, brain infarction, cerebrovascular contraction, renal insufficiency, hepatic dysfunction, arteriosclerosis and post-PTCA restenosis. wherein Ar represents an optionally substituted aryl group, and R1 represents a hydrogen atom, an optionally substituted lower alkyl group, an optionally substituted aryl group, an optionally substituted cycloalkyl group or an optionally substituted heterocyclic group.
    Type: Grant
    Filed: January 10, 2000
    Date of Patent: September 18, 2001
    Assignees: Teikoku Hormone Mfg. Co., Ltd.
    Inventors: Hiroshi Azuma, Haruo Yamashita, Katsuyuki Keino, Shuji Ota, Takahisa Saito, Shuichiro Sato, Hidehisa Hamasaki, Katsura Suzuki, Akiko Sugimoto