Patents by Inventor Masatoshi Inai

Masatoshi Inai 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: 6232128
    Abstract: The invention relates to a bicarbonate-containing medical solution package. The package comprises a gas-permeable plastic container holding a bicarbonate-containing medical solution and a gas-impermeable plastic packaging member containing the gas-permeable plastic container. A carbon-dioxide atmosphere is established in the space between the container and packaging member. In addition, a pH indicating device is contained within the space between the container and packaging member. The pH indicating device is a gas-permeable plastic packet containing a bicarbonate-containing fluid (similar to the medical solution) and a pH indicator. The pH indicator undergoes a change in color in response to a change in pH of the fluid. Use of this package allows the easy monitoring of a change in pH and consequent aging of the medical solution due to prolonged storage or damage to the outer packaging member.
    Type: Grant
    Filed: December 16, 1998
    Date of Patent: May 15, 2001
    Assignee: Otsuka Pharmaceutical Factory, Inc.
    Inventors: Seiichiro Iguchi, Shino Shinomiya, Rika Hamamoto, Akiyo Abe, Masatoshi Inai, Keiichi Kawakami
  • Patent number: 5496844
    Abstract: The present invention provides indole derivatives of the general formula: ##STR1## The indole derivatives of the invention have potent antiestrogen activity and are useful as drugs for the treatment of estrogen-dependent diseases, such as anovulatory infertility, prostatic hypertrophy, osteoporosis, breast cancer, endometrial cancer and melanoma.
    Type: Grant
    Filed: November 8, 1994
    Date of Patent: March 5, 1996
    Assignee: Otsuka Pharmaceutical Factory, Inc.
    Inventors: Masatoshi Inai, Tadanao Shibutani, Jun Kanaya, Masako Moritake, Akie Tanaka
  • Patent number: 5420128
    Abstract: The invention discloses a pyrimidien derivative expressed in Formula [I]: ##STR1## where R.sup.1 denotes a hydrogen atom or hydroxyl group, R.sup.2 denotes a hydrogen atom, lower alkoxycarbonyl group, lower alkoxy group, halogen atom, lower alkyl group, cycloalkyl group with 3 to 8 carbon atoms, lower alkoxycarbonyl lower alkyl group, carboxyl group, carboxy lower alkyl group, group: --CONHR.sup.6 (R.sup.
    Type: Grant
    Filed: June 9, 1992
    Date of Patent: May 30, 1995
    Assignee: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Hiroshi Kiyokawa, Satoshi Yamada, Keisuke Miyajima, Kinji Hashimoto, Masatoshi Inai, Makoto Inoue, Kunihiko Tatsumi, Takeshi Yamauchi, Kazunobu Kurisu, Yoshifumi Chone
  • Patent number: 5204326
    Abstract: Novel polypeptide derivatives, acid-addition salts thereof and complexes thereof, having the activities for inhibiting bone calcium absorption, for lowering the blood level of calcium, as analgesics, for inhibiting secretion of the gastric juice.Pharmaceutical composition can be prepared by formulating, at least one of the novel polypeptide derivatives, acid-addition salts thereof and complexes thereof, together with a proteolytic enzyme inhibitors and/or pharmaceutically acceptable acids.The pharmaceutical composition are quite effective as agents for curing hypercalcemia, for curing Peget's disease, for curing osteoporosis, analgetic agent, anti-ulcerative agent and the like.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: April 20, 1993
    Assignees: Otsuka Pharmaceutical Co., Ltd., Otsuka Pharmaceutical Factory, Inc.
    Inventors: Setsuro Fujii, deceased, by Keiko Fujii, successor, by Shinichiro Fujii, successor, by Kaoruko Takada, successor, Yoshihito Yamamoto, Fumio Shimizu, Masatoshi Inai, Naosumi Kinoshita, Shizuo Nakamura, Mitsuru Hirohashi, Takashi Sakamoto, Kazuhiko Tsutsumi, Tetsuhiko Shirasaka
  • Patent number: 5162305
    Abstract: Novel synthetic polypeptide derivatives, i.e., novel calcitonin derivatives, having improved basic physiological activities of the corresponding natural calcitonins, i.e., the activity for lowering the blood level of calcium, the activity as an analgesic, as well as the activity for inhibiting the secretion of the gastric juice. Thus these synthetic calcitonins are effective as agents for curing hypercalcemia, analgetic agents, anti-ulcerative agents and the like.
    Type: Grant
    Filed: February 23, 1989
    Date of Patent: November 10, 1992
    Assignees: Otsuka Pharmaceutical Co., Ltd., Otsuka Pharmaceutical Factory, Inc.
    Inventors: Setsuro Fujii, Yoshihito Yamamoto, Fumio Shimizu, Masatoshi Inai, Mitsuru Hirohashi
  • Patent number: 5137887
    Abstract: The invention relates to a salt selected from group consisting of alkali metal salts and alkaline earth metal salts of an optically active form of a 4-hydroxy-8-(3-lower alkoxy-4-phenylsulfinylphenyl)pyrazolo[1,5-a]-1,3,5-triazine, a process for producing said optically active compound or salt thereof, and a pharmaceutical composition, such as an antipodagric agent, comprising an effective amount of the salt together with a pharmaceutically acceptable nontoxic carrier.
    Type: Grant
    Filed: August 15, 1990
    Date of Patent: August 11, 1992
    Assignee: Otsuka Pharmaceutical Factory, Inc.
    Inventors: Kinji Hashimoto, Masatoshi Inai
  • Patent number: 4977179
    Abstract: Disclosed is a proline derivative of the formula ##STR1## or a pharmaceutically acceptable salt thereof. These derivatives have useful utilities such as activity of inhibiting angiotensin converting enzyme.
    Type: Grant
    Filed: April 19, 1989
    Date of Patent: December 11, 1990
    Assignee: Otsuka Pharmaceutical Factory, Inc.
    Inventors: Shizuo Nakamura, Masatoshi Inai, Makoto Inoue, Kazushi Nagao, Yoshiaki Tsuda
  • Patent number: 4886813
    Abstract: Disclosed is a proline derivative of the formula ##STR1## or a pharmaceutically acceptable salt thereof. These derivatives have useful utilities such as activity of inhibiting angiotensin converting enzyme.
    Type: Grant
    Filed: April 28, 1986
    Date of Patent: December 12, 1989
    Assignee: Otsuka Pharmaceutical Factory, Inc.
    Inventors: Shizuo Nakamura, Makoto Inoue, Masatoshi Inai, Yoshiaki Tsuda