Patents by Inventor Shun-ichi Hata

Shun-ichi Hata 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: 4578465
    Abstract: Phenylpiperazine derivatives of the formula: ##STR1## wherein R.sub.1 is a hydrogen atom or a straight- or branched-chain saturated or unsaturated alkyl group having 1 to 8 carbon atoms which may be substituted at any position by a hydroxyl group, a carboxyl group, a lower alkoxycarbonyl group or an oxo group; and R.sub.2 is a hydrogen atom, a halogen atom, a lower alkyl group or a sulfamoyl group, and a process for producing the same are disclosed. The derivatives of the formula have alpha blocking and serotonin antagonizing activities and are useful as a drug.
    Type: Grant
    Filed: April 30, 1984
    Date of Patent: March 25, 1986
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Hiroyuki Nagano, Mitiro Takagi, Noboru Kubodera, Isao Matsunaga, Hiroyuki Nabata, Yasuhiro Ohba, Kazushige Sakai, Shun-ichi Hata, Yasumi Uchida
  • Patent number: 4560686
    Abstract: Compounds of the formula ##STR1## (wherein R.sub.1 is a lower alkyl group, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, represent a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, a hydroxyl group, a trifluoromethyl group or a lower alkoxycarbonyl group; two adjacent groups of R.sub.2, R.sub.3 and R.sub.4 may combine to form a methylenedioxy group; n is an integer of 2 to 6) or salts thereof, are disclosed.These compounds are useful as agents for treating circulatory diseases because they have hypotensive action and are capable of increasing the cerebral blood flow, decreasing the heart rate and suppressing ventricular arrhythmia due to myocardial ischemia.
    Type: Grant
    Filed: September 14, 1983
    Date of Patent: December 24, 1985
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Hiroyuki Nagano, Mitiro Takagi, Noboru Kubodera, Isao Matsunaga, Hiroyuki Nabata, Yasuhiro Ohba, Kazushige Sakai, Shun-ichi Hata, Yasumi Uchida
  • Patent number: 4507309
    Abstract: A treating agent whose effective ingredient is an anthranyl derivative of the formula: ##STR1## (wherein R.sub.1 and R.sub.2 may be the same or different and represent a hydrogen atom, a hydroxyl group, a lower alkoxy group, preferably C.sub.1 -C.sub.3 alkoxy group, a lower alkyl group, preferably C.sub.1 -C.sub.3 alkyl group, a nitro group or a halogen atom) is disclosed.
    Type: Grant
    Filed: April 12, 1982
    Date of Patent: March 26, 1985
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Shin-ichi Kaiho, Koji Mizuno, Shun-ichi Hata, Masuo Koizumi, Masamitsu Honda, Yasushi Murakami, Shigeru Takanashi, Minoru Shindo
  • Patent number: 4447453
    Abstract: An anti-peptic ulcer agent which contains as an active ingredient aminobenzoic acid compounds of the formula ##STR1## (wherein R.sub.1, R.sub.2, and R.sub.3 which may be the same or different represent a hydrogen atom, halogen atom, lower alkyl group or lower alkoxy group but they do not represent a hydrogen atom at the same time) or pharmaceutically acceptable salts thereof and a method of preventing or treating a human in need of said prevention or treatment an effective amount of said active ingredient are disclosed.
    Type: Grant
    Filed: November 17, 1981
    Date of Patent: May 8, 1984
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Mitsura Tanemura, Tamotsu Yamazaki, Koji Mizuno, Shin-ichi Kaiho, Morio Kakimoto, Eiichi Hoshino, Isao Matsunaga, Shun-ichi Hata
  • Patent number: 4438115
    Abstract: An agent for treating diseases in circulatory organs which comprises a piperazine compound of the formula ##STR1## wherein R.sub.1, R.sub.2 and A are as defined hereunder, or a salt thereof and a pharmaceutically acceptable carrier.
    Type: Grant
    Filed: June 10, 1981
    Date of Patent: March 20, 1984
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Hiroyuki Nagano, Mitiro Takagi, Noboru Kubodera, Isao Matsunaga, Tamotsu Yamazaki, Hiroyuki Nabata, Kazushige Sakai, Shun-ichi Hata
  • Patent number: 4435391
    Abstract: Dibenzoxazepine derivatives of the formula: ##STR1## wherein R.sub.1, n, R.sub.2 and R.sub.3 are as defined in the description, process for preparing the same, pharmaceutical composition containing the same and method of treating diseases in circulatory organs administering the composition to a patient are disclosed.The compounds of the formula have lipid lowering activity, lipid peroxide lowering activity, blood sugar lowering activity and activity to inhibit the aggregation of platelets, and hence are useful as a medicine.
    Type: Grant
    Filed: March 4, 1982
    Date of Patent: March 6, 1984
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Kazuo Sasahara, Masamitsu Honda, Masuo Koizumi, Yasushi Murakami, Tomohiro Neichi, Hiroshi Nakakimura, Yukifumi Noda, Hiroshi Matsushita, Shun-ichi Hata
  • Patent number: 4415569
    Abstract: Pyrazoloindazole derivatives of the formula: ##STR1## [wherein R.sub.1 is a cyano group, carboxy group, a lower alkoxycarbonyl group or a group ##STR2## (wherein R.sub.2 and R.sub.3 are each a hydrogen atom, a lower alkyl group, a phenyl group which may have a substituent or when taken together with a nitrogen atom, form a heterocyclic ring); X.sup..crclbar. is a counter ion], a process for preparing the same and a pharamaceutical composition containing the same are disclosed. The compounds of the formula above have bronchodilating action and are useful as a medicine.
    Type: Grant
    Filed: December 17, 1981
    Date of Patent: November 15, 1983
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Fujimura Yasuo, Tanaka Sadao, Matsunaga Isao, Yasuyuki Shiraki, Yugo Ikeda, Tamotsu Yamazaki, Yasuhiro Ohba, Kazushige Sakai, Shun-ichi Hata, Minoru Shindo
  • Patent number: 4409234
    Abstract: Novel pyrazoloindazole derivatives of the formula ##STR1## wherein R.sub.1 is a hydrogen atom, halogen atom, a hydroxyl group, a lower alkyl group, a lower alkoxyl group or benzyloxyl group; R.sub.2 is a hydrogen atom, a halogen atom, a lower alkyl group or phenyl group (provided R.sub.1 and R.sub.2 are not hydrogen at the same time); and X.sup..crclbar. is a halide ion, a hydroxide ion, a methanesulfonate ion, a p-toluene sulfonate ion, a sulfate ion, a nitrate ion, a carbonate ion, an acetate ion, a benzoate ion or a salicylate ion, a process for preparing the derivatives, and a pharmaceutical composition containing the same are disclosed. The derivatives have good bronchodilating action for human without exhibiting substantially bad effects on the functioning of heart, and therefore, they are useful as a drug.
    Type: Grant
    Filed: June 3, 1982
    Date of Patent: October 11, 1983
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Yasuo Fujimura, Sadao Tanaka, Isao Matsunaga, Yasuyuki Shiraki, Yugo Ikeda, Tamotsu Yamazaki, Yasuhiro Ohba, Shun-ichi Hata, Minoru Shindo, Kazushige Sakai
  • Patent number: 4379150
    Abstract: Dibenz[b,f][1,4]oxazepine derivatives of the formula ##STR1## (wherein R.sub.1 is a hydrogen atom or a lower alkyl group; R.sub.2 is a branched lower alkyl group; R.sub.3 is a hydrogen atom, a carboxyl group, a carbamoyl group, a lower alkoxycarbonyl group, or a lower alkoxy group; R.sub.4 and R.sub.5 are each a lower alkyl group or may, when taken together with a nitrogen atom, form a heterocyclic ring; and A is a lower alkylene group) or salts thereof, a process for preparing the same and pharmaceutical compositions comprising the same are disclosed. The derivatives of the formula above are effective to prevent and treat circulatory diseases, especially angina pectoris, and therefore, useful as medicines.
    Type: Grant
    Filed: December 17, 1981
    Date of Patent: April 5, 1983
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Kiyohiko Ito, Masuo Koizumi, Yasushi Murakami, Michitaka Akima, Jinichiro Aono, Yasuhiro Ohba, Tamotsu Yamazaki, Kazushige Sakai, Shun-ichi Hata, Shigeru Takanashi
  • Patent number: 4366161
    Abstract: Novel compound, 1,2-bis(nicotinamido)propane and its pharmaceutically acceptable salts, a process for preparing the same and a pharmaceutical composition containing the same as an active ingredient are disclosed.The compound acts to prevent or spasmolyse cerebral vasospasms, to prevent cerebral apoplexy and to lower the lipoperoxide level in blood.
    Type: Grant
    Filed: November 17, 1980
    Date of Patent: December 28, 1982
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Takashi Mori, Sakae Takaku, Fumiaki Matsuura, Yasushi Murakami, Yukifumi Noda, Tamotsu Yamazaki, Tomohiro Neichi, Hiroshi Nakakimura, Shigeyuki Kataoka, Takashi Matsuno, Shun-ichi Hata, Shigeru Takanashi
  • Patent number: 4361572
    Abstract: 1,4,5,6-Tetrahydronicotinamide derivative represented by the formula: ##STR1## (wherein R is defined in the specification), a process of preparing the same and pharmaceutical composition containing the same are disclosed.The compound has action for suppressing aggregation of platelets, and antiinflammatory, antipyretic and analgesic actions.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: November 30, 1982
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Sakae Takaku, Fumiaki Matsuura, Takashi Mori, Yasushi Murakami, Shigeyuki Kataoka, Yasuhisa Takeda, Yasuhiro Yamashita, Yumiko Takeda, Takashi Matsuno, Koji Mizuno, Shinichi Kaiho, Tamotsu Yamazaki, Shun-ichi Hata, Shigeru Takanashi
  • Patent number: 4290953
    Abstract: Dibenz[b,f][1,4]oxazepine derivatives represented by the formula ##STR1## [wherein R.sub.1, n, R.sub.2 and R.sub.3 are as defined in the specification], and a process for preparing the same are disclosed. The object compounds have excellent serum cholesterol lowering activity, serum lipid lowering activity, blood lipid peroxide lowering activity and anti-aggregation of platelet activity, and therefore are useful as a drug.
    Type: Grant
    Filed: December 5, 1979
    Date of Patent: September 22, 1981
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Masuo Koizumi, Kazuo Sasahara, Yasushi Murakami, Sakae Wada, Hiroshi Nakakimura, Noboru Kubodera, Shun-Ichi Hata
  • Patent number: 4092426
    Abstract: An aminobenzoic acid derivative represented by the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are defined hereinbelow, which has excellent activity for improving liver function and for potentiating and normalizing immunity; a process for preparing the same; and a pharmaceutical composition containing the same are disclosed.
    Type: Grant
    Filed: June 1, 1976
    Date of Patent: May 30, 1978
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Mitsuru Tanemura, Teizo Shinozaki, Minoru Shindo, Shun-ichi Hata, Koji Mizuno, Masayoshi Ono, Kiyoshige Wakabayashi, Toshiaki Nakano, Yasuho Nishii, Takashi Matsuno, Yoshiyuki Ohsugi
  • Patent number: 4058601
    Abstract: A pharmaceutical composition for reducing the alcohol content or slowing the rate of increase thereof in the blood and inhibiting the accumulation of neutral lipid in the liver containing a uridine diphosphate as an effective ingredient and a method of the use thereof are disclosed.
    Type: Grant
    Filed: July 1, 1975
    Date of Patent: November 15, 1977
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Shun-ichi Hata, Koji Mizuno, Yasuho Nishii, Etsuko Mitsuishi, Motoharu Shiba
  • Patent number: 4027017
    Abstract: A pharmaceutical composition for treating alcoholism containing a uridine diphosphate glucuronic acid as an effective ingredient and a method of the use thereof are disclosed.
    Type: Grant
    Filed: July 7, 1975
    Date of Patent: May 31, 1977
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Shun-ichi Hata, Koji Mizuno, Yasuho Nishii, Etsuko Mitsuishi, Motoharu Shiba
  • Patent number: 4011219
    Abstract: Phthalazine derivatives represented by the formula ##STR1## and salts thereof which are useful for a luminescence immuno assay, or a process for preparing the same are disclosed.
    Type: Grant
    Filed: March 28, 1975
    Date of Patent: March 8, 1977
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Yasuho Nishii, Shun-ichi Hata, Kiyoshige Wakabayashi, Koji Mizuno, Akio Yoshida, Minoru Shindo
  • Patent number: 3949069
    Abstract: A novel nitrogen-containing carbohydrate can be obtained from a proliferating tissue. The carbohydrate has an activity against transplanted Krebs-2 and Sarcoma-180 tumors in mice and also may be used as a diagnostic ingredient for the detection of such tumors.
    Type: Grant
    Filed: March 22, 1974
    Date of Patent: April 6, 1976
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventor: Shun-ichi Hata