Patents by Inventor Takeo Iwakuma

Takeo Iwakuma 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: 5190975
    Abstract: Method for the treatment or prophylaxis of thromboses or asthma in warm-blooded animal which comprises administering an effective amount of a compound having the formula: ##STR1## wherein R.sup.1 is phenyl group or phenyl group substituted by a member selected from the group consisting of C.sub.1 -C.sub.5 alkyl, C.sub.1 -C.sub.5 alkoxy, halogen atom, trifluoromethyl, and nitro, or naphthyl group, and R.sup.2 is hydroxymethyl or a group of the formula: ##STR2## wherein R.sup.3 is hydrogen atom or C.sub.1 -C.sub.5 alkyl and R.sup.4 is C.sub.3 -C.sub.6 cycloalkyl, C.sub.2 -C.sub.6 alkoxycarbonyl-phenyl, carboxy-phenyl, C.sub.1 -C.sub.5 alkyl, or C.sub.1 -C.sub.5 alkyl having a substituent selected from C.sub.1 -C.sub.5 alkoxycarbonyl, carboxy, C.sub.2 -C.sub.6 alkoxycarbonyl-phenyl, carboxy-phenyl, C.sub.2 -C.sub.6 alkoxycarbonyl-(C.sub.3 -C.sub.6) cycloalkyl and carboxy-(C.sub.3 -C.sub.6) cycloalkyl, or a pharmaceutically acceptable salt thereof to said warm blooded animal.
    Type: Grant
    Filed: June 12, 1992
    Date of Patent: March 2, 1993
    Assignee: Tanabe Seiyaku Co., Ltd.
    Inventors: Takeo Iwakuma, Harumichi Kohno, Yasuhiko Sasaki, Katsuo Ikezawa, Akio Odawara
  • Patent number: 5030652
    Abstract: Indan derivatives of the formula: ##STR1## wherein R.sup.1 is substituted or unsubstituted phenyl, naphthyl or sulfur-containing heterocyclic group, and R.sup.2 is hydroxy-methyl or a group of the formula: ##STR2## wherein R.sup.3 is hydrogen atom or lower alkyl and R.sup.4 is cycloalkyl, lower alkoxycarbonyl-phenyl, carboxy-phenyl, nitrogen-containing heterocyclic group, lower alkyl, or lower alkyl having a substituent selected from lower alkoxycarbonyl, carboxy, lower alkoxycarbonyl-phenyl, carboxy-phenyl, lower alkoxycarbonyl-cycloalkyl and carboxy-cycloalkyl, or a pharmaceutically acceptable salt thereof, which are useful as a platelet aggregation-inhibiting agent and as an agent for the treatment, amelioration and/or prophylaxis of a variety of thrombosis or embolism, coronary and cerebral vascular smooth muscle vellication, asthma, and the like, processes for the preparation thereof, and pharmaceutical composition containing said compound as an active ingredient.
    Type: Grant
    Filed: November 15, 1988
    Date of Patent: July 9, 1991
    Assignee: Tanabe Seiyaku Co., Ltd.
    Inventors: Takeo Iwakuma, Harumichi Kohno, Yasuhiko Sasaki, Katsuo Ikezawa, Akio Odawara
  • Patent number: 4975460
    Abstract: Novel indanoxyacetic acid derivatives of the formula: ##STR1## wherein R.sup.1 is a lower alkyl group, a substituted or unsubstituted phenyl group, naphtyl group or a sulfur-containing heterocyclic group, R.sup.2 is hydroxy group or a protected hydroxy group, p is an integer of 2 or 3, and q is an integer of 0 or 1, and a salt thereof are disclosed.Said derivative (I) and a salt thereof are useful as a platelet aggregation-inhibiting agent and an agent for the treatment, amelioration and/or prophylaxis of a variety of thrombosis, embolism, coronary and cerebral vascular smooth muscl vellication, asthma, and the like.
    Type: Grant
    Filed: February 17, 1989
    Date of Patent: December 4, 1990
    Assignee: Tanabe Seiyaku Co., Ltd.
    Inventors: Takeo Iwakuma, Harumichi Kohno, Yasuhiko Sasaki, Katsuo Ikezawa, Akio Odawara
  • Patent number: 4963587
    Abstract: There are disclosed are glycine derivative of the formula: ##STR1## (wherein R.sup.1 represents a substituted or unsubstituted phenyl group, R.sup.2 represents a carboxyl group which may be protected, Q represents a lower alkylene group and m represents 0 or 1) or a pharmacologically acceptable salt thereof and a process for preparing the same.
    Type: Grant
    Filed: December 5, 1989
    Date of Patent: October 16, 1990
    Assignee: Tanabe Seiyaku Co., Ltd.
    Inventors: Takeo Iwakuma, Yasuo Sekine, Yasuhiko Sasaki, Katsuo Ikezawa, Akio Odawara
  • Patent number: 4948810
    Abstract: Novel phenoxyacetic acid derivative of the formula: ##STR1## wherein R is a substituted or unsubstituted phenyl group, naphthyl group or a sulfur-containing 5-membered hetero-monocyclic group, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are hydrogen atom, a lower alkyl group, a phenyl-lower alkyl group or phenyl group, R.sup.5 is hydrogen atom or a lower alkyl group, R.sup.6 is carboxyl group, a protected carboxyl group, hydroxy group or a di(lower alkyl)-amino group, Ring A is a substituted or unsubstituted phenylene group, m is 0 or 1 and n is an integer 0 to 5, provided that, when m is 0,(1) at least either one of R.sup.1 to R.sup.4 is or/are a phenyl-lower alkyl group or phenyl group,(2) at least either one of R.sup.1 to R.sup.4 is or/are a lower alkyl group, and R.sup.6 is hydroxy group, or(3) all of R.sup.1 to R.sup.4 are hydrogen atom, and Ring A is a substituted phenylene group,or a pharmaceutically acceptable salt thereof are disclosed.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: August 14, 1990
    Assignee: Tanabe Seiyaku Co., Ltd.
    Inventors: Takeo Iwakuma, Takayuki Kawaguchi, Toyoharu Yamashita, Yasuhiko Sasaki, Tamotu Shimazaki
  • Patent number: 4866196
    Abstract: Novel phenoxyacetic acid of the formula: ##STR1## wherein Ring A is phenylene group or a phenylene group having 1 to 2 substituent(s) selected from a lower alkyl group, a lower alkoxy group and a halogen atom; either one or two group(s) of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are a lower alkyl group, and the other groups are hydrogen atom; R.sup.5 is phenyl group or a phenyl group having 1 to 3 substituent(s) selected from a lower alkyl group, a halogen atom a lower alkoxy group and nitro group; and --COOR.sup.6 is carboxyl group or a protected carboxyl group, or a salt thereof are disclosed. Said derivative (I) and a salt thereof have a potent platelet aggregration-inhibiting activity.
    Type: Grant
    Filed: January 4, 1988
    Date of Patent: September 12, 1989
    Assignee: Tanabe Seiyaku Co., Ltd.
    Inventors: Takeo Iwakuma, Takayuki Kawaguchi, Toyoharu Yamashita, Yasuhiko Sasaki, Tamotu Shimazaki
  • Patent number: 4579854
    Abstract: A novel carbostyril derivative of the formula: ##STR1## or a pharmaceutically acceptable acid addition salt thereof, and a process for preparing same. The compound (I) shows potent bronchodilating activity and is useful as a bronchodilator.
    Type: Grant
    Filed: December 21, 1984
    Date of Patent: April 1, 1986
    Assignee: Tanabe Seiyaku Co., Ltd.
    Inventors: Takeo Iwakuma, Akira Tsunashima, Katsuo Ikezawa, Osasi Takaiti
  • Patent number: RE33024
    Abstract: A novel carbostyril derivative of the formula: ##STR1## or a pharmaceutically acceptable acid addition salt thereof, and a process for preparing same. The compound (I) shows potent bronchodilating activity and is useful as a bronchodilator.
    Type: Grant
    Filed: July 9, 1987
    Date of Patent: August 15, 1989
    Assignee: Tanabe Seiyaku Co. Ltd.
    Inventors: Takeo Iwakuma, Akira Tsunashima, Katsuo Ikezawa, Osasi Takaiti