Patents by Inventor Sumiro Isoda

Sumiro Isoda 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).

  • Tricyclic triazolopyrimidine derivatives
    Patent number: 4898943
    Abstract: Novel tricyclic triazolopyrimidine compounds represented by formula (I) shown in the specification and physiologically acceptable salts thereof are disclosed. These compounds have an excellent anti-allergic activity and are useful for treatment and prophylaxis of allergic diseases.
    Type: Grant
    Filed: February 8, 1988
    Date of Patent: February 6, 1990
    Assignee: Daiichi Seiyaku Co., Ltd.
    Inventors: Sumiro Isoda, Shunzo Aibara, Tamotsu Miwa, Hiroyuki Fujiwara, Shuichi Yokohama, Hiroo Matsumoto
  • Thiazolo[3,2-a][1,2,3]triazolo[4,5-d]pyrimidine and [1,3,4]thiadiazolo[3,2-a][1,2,3]triazolo[4,5-d]pyrimidine derivatives
    Patent number: 4652646
    Abstract: Novel triazolopyrimidine compounds represented by the formula (I) and physiologically acceptable salts thereof are disclosed. These compounds have an excellent anti-allergic activity in oral administration and are useful for treatment and prophylaxis of allergic diseases such as bronchial asthma, allergic gastro-intestinal disorders, allergic rhinitis, hay fever, urticaria and the like.
    Type: Grant
    Filed: April 25, 1985
    Date of Patent: March 24, 1987
    Assignee: Daiichi Seiyaku Co., Ltd.
    Inventors: Sumiro Isoda, Norio Suzuki, Tamotsu Miwa, Shunzo Aibara
  • 2-Aminotetralin derivatives and process for producing the same
    Patent number: 4239903
    Abstract: Compounds, which have antispasmodic effects, represented by the following formula (I) ##STR1## wherein R.sup.1 and R.sup.2, which may be the same or different, each represents a hydrogen atom, an alkoxy group or, when taken together, R.sup.1 and R.sup.2 represent an alkylenedioxy group; R.sup.3 represents a hydrogen atom, an alkyl group or a cycloalkyl group; R.sup.4, R.sup.5 and R.sup.6, which may be the same or different, each represents a hydrogen atom, an alkoxy group, an alkyl group, a halogen atom, a hydroxyl group or, when two of R.sup.4, R.sup.5 and R.sup.6 are taken together, they represent an alkylenedioxy group; and A represents a straight or branched chain alkylene group having 2 to 10 carbon atoms or an alkylene group having 2 to 10 carbon atoms and interrupted with an oxygen atom forming an ether bond therein, and the therapeutically useful acid-addition salts thereof; and a process for producing the same.
    Type: Grant
    Filed: May 16, 1978
    Date of Patent: December 16, 1980
    Assignee: Daiichi Seiyaku Co., Ltd.
    Inventors: Sumiro Isoda, Munefumi Kanao, Yoshifumi Ichikawa, Takeshi Hashizume, Kiyoshi Irie, Yoshio Kasai