Patents by Inventor Sakae Takaku

Sakae Takaku 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: 5563258
    Abstract: This specification discloses a production process for an sucralfate aqueous suspension stock, the process being characterized by direct dispersement of an sucralfate aqueous stock for sucralfate preparations, which contains sucralfate particles with an average particle size of no more than 50 .mu.m in a concentration of 1-2 g/ml, in water or other aqueous medium without drying the synthesized sucralfate wet powder, followed by milling of the sucralfate particles to an average particle size of no more than 50 .mu.m. When the sucralfate aqueous suspension stock obtained directly from wet powder in accordance with this method is compared to the conventional suspension obtained from dry powder, equivalency of both stocks are obtained in terms of both properties and pharmacological activities. In comparison to the conventional process using dry powder, this wet milling method of production is economically and operationally superior and environmental pollution arising from the conventional process can be prevented.
    Type: Grant
    Filed: April 26, 1995
    Date of Patent: October 8, 1996
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Kiyoshige Ochi, Kazuo Sasahara, Mituo Shiratori, Sakae Takaku
  • Patent number: 5019574
    Abstract: 4-aminopyridine derivatives represented by the general formula: ##STR1## [wherein R.sub.1 is a hydrogen atom, a hydroxyl group, a linear or branched lower alkyl group or a cycloalkyl group which may be substituted by a hydroxyl group, a lower alkoxy group, a lower alkyl or a cycloalkyl group which contains a carbonyl group, a morpholino group or a group --NH--B (where B is a lower alkyl group, a cycloalkyl group or a phenyl group); R.sub.2 and R.sub.3 which may be the same or different each represents a hydrogen atom, a lower alkyl group or a loweralkylcarbonyl group, or when taken together, form an azacycloalkyl group, a morpholino group or an N-methylpiperazinyl group together with the nitrogen atom; R.sub.4 and R.sub.5 each represents a hydrogen atom, or when taken together with the ring A, form a quinoline ring or a 5,6,7,8-tetrahydroquinoline ring, provided that when each of R.sub.1, R.sub.4 and R.sub.5 is a hydrogen atom, R.sub.2 and R.sub.
    Type: Grant
    Filed: September 28, 1989
    Date of Patent: May 28, 1991
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Yutaka Miura, Mitsutaka Yoshida, Yasuo Fujimura, Sakae Takaku, Yukifumi Noda
  • 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: 4221814
    Abstract: A terephthalic acid monoamide derivative of the formula: ##STR1## (wherein R is a straight- or branched-chain lower alkyl group; R' and R" may be the same or different, and represent a hydrogen atom, or a straight- or branched-chain lower alkyl group) or pharmaceutically acceptable salts thereof are disclosed. A process for preparing such terephthalic acid monoamide derivative or its salts, as well as an anti-allergic agent containing such derivative or its salts as an effective ingredient are also disclosed.
    Type: Grant
    Filed: June 1, 1979
    Date of Patent: September 9, 1980
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Sakae Takaku, Takashi Mori, Yasushi Murakami, Yoshiyuki Ohsugi, Shigeyuki Kataoka, Yasuhisa Takeda, Takashi Matsuno, Yoshimitsu Iida, Akiko Ariga, Akira Okazaki, Kazuo Igusa, Toshichika Ogasawara, Minoru Shindo
  • Patent number: 4200640
    Abstract: A compound of the formula ##STR1## is useful for treating circulatory diseases.
    Type: Grant
    Filed: September 7, 1978
    Date of Patent: April 29, 1980
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Hiroyuki Nagano, Takashi Mori, Sakae Takaku, Isao Matsunaga, Tatsuo Kujirai, Toshichika Ogasawara, Shigeru Sugano, Minoru Shindo
  • Patent number: 4092431
    Abstract: A pharmaceutical composition for prevention and treatment of gastritis and peptic ulcer of mammals including human beings which contains a bis(benzamido)benzene derivative represented by the formula ##STR1## wherein X and Y are as defined hereinbelow, or an acid addition salt thereof, as an active ingredient, and a method of the use thereof are disclosed.
    Type: Grant
    Filed: April 28, 1977
    Date of Patent: May 30, 1978
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Takashi Mori, Sakae Takaku, Nobuhiro Oi, Minoru Shindo, Takeaki Hirano, Shigeyuki Kataoka, Kouji Furuno
  • Patent number: 4058523
    Abstract: Bis(benzamido)-benzene derivatives having various pharmaceutical activities such as activity for preventing and treating peptic ulcer, peripheral vasodilating action, hypotensive activity and analgesic activity and represented by the formula ##STR1## wherein X, Y, Z, R.sub.1, R.sub.2 and R.sub.3 are as defined hereinafter and a process for preparing the same are disclosed.
    Type: Grant
    Filed: September 15, 1976
    Date of Patent: November 15, 1977
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Takashi Mori, Sakae Takaku, Nobuhiro Oi, Minoru Shindo, Takeaki Hirano, Shigeyuki Kataoka, Kouji Furuno
  • Patent number: 4038416
    Abstract: A pharmaceutical composition for prevention and treatment of gastritis and peptic ulcer of mammals including human beings which contains a bis(benzamido)-benzene derivative represented by the formula ##STR1## wherein X and Y are as defined hereinbelow or an acid addition salt thereof as an active ingredient, and a method of the use thereof are disclosed.
    Type: Grant
    Filed: September 11, 1975
    Date of Patent: July 26, 1977
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Takashi Mori, Sakae Takaku, Nobuhiro Oi, Minoru Shindo, Takeaki Hirano, Shigeyuki Kataoka, Kouji Furuno
  • Patent number: 3953496
    Abstract: A bis(benzamido)-benzoic acid derivative represented by the formula ##SPC1##Wherein R.sup.1, R.sup.2 and R.sup.3 are as defined hereinbelow and a process for preparing the same is disclosed.The compounds of the invention inhibit hemolysis of sheep red blood cell and cutaneous anaphylactic reaction, and also have an antipyretic sedative, anti-inflammatory and anti-allergic effect and are especially useful for treatment of rheumatic arthritis, bronchial asthma and nephritis.
    Type: Grant
    Filed: March 13, 1974
    Date of Patent: April 27, 1976
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Takashi Mori, Sakae Takaku, Yoshiyuki Osugi, Takashi Matsuno, Shogo Tomizawa