Patents by Inventor Takehisa Hata

Takehisa 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: 6524556
    Abstract: The use of a medium-chain fatty acid triglyceride as the dispersant in the preparation of a medicinal aerosol composition comprising tricyclic compound (I) dispersed in a liquefied hydrofluoroalkane propellant is described. When a liquefied hydrofluoroalkane is added to a kneaded premix of the tricyclic compound (I) and a medium-chain fatty acid triglyceride, the active ingredient is evenly dispersed in the liquefied hydrofluoroalkane. Therefore, by distributing a dispenser first with the kneaded premix and, then, with a liquefied hydrofluoroalkane under cooling or elevated pressure, there can be provided a medicinal aerosol composition an improved uniformity of content of the active ingredient.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: February 25, 2003
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Saburo Murata, Fumio Shiomojo, Yuji Tokunaga, Takehisa Hata
  • Publication number: 20020061906
    Abstract: The use of a medium-chain fatty acid triglyceride as the dispersant in the preparation of a medicinal aerosol composition comprising tricyclic compound (I) dispersed in a liquefied hydrofluoroalkane propellant is described.
    Type: Application
    Filed: November 28, 2001
    Publication date: May 23, 2002
    Applicant: FUJISAWA PHARMACEUTICAL CO., LTD.
    Inventors: Saburo Murata, Fumio Shiomojo, Yuji Tokunaga, Takehisa Hata
  • Patent number: 6361760
    Abstract: The use of a medium-chain fatty acid triglyceride as the dispersant in the preparation of a medicinal aerosol composition comprising tricyclic compound (I) dispersed in a liquefied hydrofluoroalkane propellant is described. When a liquefied hydrofluoroalkane is added to a kneaded premix of the tricyclic compound (I) and a medium-chain fatty acid triglyceride, the active ingredient is evenly dispersed in the liquefied hydrofluoroalkane. Therefore, by distributing a dispenser first with the kneaded premix and, then, with a liquefied hydrofluoroalkane under cooling or elevated pressure, there can be provided a medicinal aerosol composition having an improved uniformity of content of the active ingredient.
    Type: Grant
    Filed: April 22, 1998
    Date of Patent: March 26, 2002
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Saburo Murata, Fumio Shiomojo, Yuji Tokunaga, Takehisa Hata
  • Patent number: 6346537
    Abstract: To provide a pharmaceutical composition comprising a water-insoluble active substance, surfactant(s) and solid carrier(s), which is improved in dissolution and oral absorption characteristics.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: February 12, 2002
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Takehisa Hata, Yuji Tokunaga, Fumio Shimojo, Sumihisa Kimura, Takeo Hirose, Satoshi Ueda
  • Patent number: 5939427
    Abstract: A lotion comprising a tricyclic compound, typically 17-allyl-1,14-dihydroxy-12-?2-(4-hydroxy-3-methoxycyclohexyl)-1-methylviny l!-23,25-dimethoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo ?22.3.1.0.sup.4,9 !octacos-18-ene-2,3,10,16-tetraone, or a pharmaceutically acceptable salt thereof, a solubilizing and/or absorption-promoting agent, a liquid medium, and optionally an emulsifier and/or a viscosity increasing agent. The lotion is stable, excellent in absorption and has less irritation against the skin and sustained release. Also, the lotion is effective for the treatment and/or prophylaxis of inflammatory and hyperproliferative skin diseases and cutaneous manifestations of immunologically-mediated illnesses.
    Type: Grant
    Filed: January 5, 1998
    Date of Patent: August 17, 1999
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Akira Kagayama, Sachiyo Tanimoto, Saburo Murata, Takehisa Hata
  • Patent number: 5817333
    Abstract: A liposome preparation containing an immunosuppresive tricylic compound or a pharmaceutically acceptable salt thereof. Since the tricyclic compound is entrapped stably and quantitatively into the liposomes, a broad variety of drug forms and pharmaceutical preparations insuring a long duration of efficacy can be provided.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: October 6, 1998
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Akira Kagayama, Yuji Tokunaga, Atsunori Kaibara, Sachiyo Tanimoto, Takehisa Hata
  • Patent number: 5770607
    Abstract: This invention relates to an aqueous liquid composition for external use which contains a tricyclo compound of the chemical formula (I) presented here-under or a pharmaceutically acceptable salt thereof. More particularly, the invention relates to an aqueous liquid composition for external use characterized in that it contains said tricyclo compound and a water-soluble solubilizer. The composition of the invention is used in medical treatment.
    Type: Grant
    Filed: July 18, 1994
    Date of Patent: June 23, 1998
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Toshiyasu Honbo, Sachiyo Tanimoto, Hiromitsu Yoshida, Takehisa Hata, Sotoo Asakura, Yasuto Koyama, Youhei Kiyota
  • Patent number: 5747069
    Abstract: A percutaneously absorbable preparation containing a drug and a percutaneous absorption accelerator comprising a monoglyceride and a fatty acid.
    Type: Grant
    Filed: March 15, 1996
    Date of Patent: May 5, 1998
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Sotoo Asakura, Sumihisa Kimura, Kazutake Kado, Yoshiko Ohishi, Takehisa Hata
  • Patent number: 5683716
    Abstract: This invention relates to an encapsulated pharmaceutical dosage form comprising a practically insoluble compound or salt and an intracapsular fluid, and/or a surfactant and/or cellulose derivative. It provides for increased oral absorption as compared with the conventional system because, on release of capsule contents from the capsule shell, the practically insoluble compound or salt undergoes diminution in crystal size.
    Type: Grant
    Filed: January 2, 1996
    Date of Patent: November 4, 1997
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Takehisa Hata, Fumio Shimojo, Kazutake Kado, Kyoko Ishii, Seiji Sawai
  • Patent number: 5656663
    Abstract: An external skin treatment agent composition containing an active ingredient comprising a prostacyclin, and/or its optical isomer, having the formula (I): ##STR1## (wherein, R.sup.1 is a hydrogen atom, a straight chain or branched alkyl group of C.sub.1 to C.sub.10, or one equivalent of a cation, R.sup.2 is a substitutable C.sub.1 to C.sub.10 straight chain or branched alkyl group or substitutable C.sub.1 to C.sub.10 straight chain or branched alkenyl group or alkinyl group, R.sup.3 is a straight chain alkyl group of C.sub.1 to C.sub.5, and R.sup.4 and R.sup.5 are independently a hydroxyl group or formula: ##STR2## (where, R.sup.6 is a C.sub.1 to C.sub.5 straight chain or branched alkyl group)) and a carrier.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: August 12, 1997
    Assignee: Teijin Limited
    Inventors: Atsuo Hazato, Nobuaki Hanajima, Yuji Makino, Toshiaki Takeda, Tamotsu Koyama, Takehisa Hata, Sumihisa Kimura, Saburo Murata
  • Patent number: 5654009
    Abstract: The invention relates to a delayed action preparation which comprises a core comprising a drug and a swelling agent and an outer membrane comprising a biodegradable high molecular weight substance characterized in that the swelling agent is contained in a sufficient amount to cause a explosion of the outer membrane of biodegradable high molecular weight substance at a definite time after administration. This preparation provides for free control over the timing of drug release and is suited for administration not only by the oral route but also by the intramuscular, subcutaneous and other routes.
    Type: Grant
    Filed: April 22, 1996
    Date of Patent: August 5, 1997
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Takehisa Hata, Akira Kagayama, Sumihisa Kimura, Satoshi Ueda, Saburo Murata
  • Patent number: 5601844
    Abstract: A sustained release medicinal preparation is produced by enclosing a macrocyclic compound represented by 17-allyl-1,14-dihydroxy-12-[2-(4-hydroxy-3-methoxycyclohexyl)-1-methylviny l)-23,25-dimethoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo[22.3.1 .0.sup.4,9 ]octacos-18-ene-2,3,10,16-tetraone or 17-ethyl-1,14-dihydroxy-12-[2-(4-hydroxy-3-methoxycyclohexyl)-1-methylviny l]-23,25-dimethoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo[22.3.1 .0.sup.4,9 ]octacos-18-ene-2,3,10,16-tetraone, into the fine particles generally called microspheres which arc made of biodegradable polymer. This preparation, when, for example, given by injection, appreciably improves the transferance of said macrocyclic compound into the blood. Further, this is also used as an agent suitable for topical administration.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: February 11, 1997
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Akira Kagayama, Sumihisa Kimura, Saburo Murata, Sachiyo Tanimoto, Takehisa Hata
  • Patent number: 5215995
    Abstract: A hair revitalizing agent including a compound represented by the formula shown below or a pharmaceutically acceptable salt thereof: ##STR1## (wherein R.sup.1 to R.sup.10, R.sup.14 to R.sup.23, X, Y, and n are the same as defined in the present specification).
    Type: Grant
    Filed: April 2, 1992
    Date of Patent: June 1, 1993
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Toshiyasu Honbo, Takehisa Hata, Akihiro Ishino, Yoshiharu Tsuji
  • Patent number: 5152999
    Abstract: The present invention relates to liposome preparations. In particular, the present invention relates to Adriamycin-entrapped liposome preparations comprising cholesterol derivatives having a negative charge as a liposome membrane constituent. Adriamycin-entrapped liposome preparations have many uses in the medical field such as maintaining high Adriamycin blood levels over a long period of time and reducing systemic toxicity, for example.
    Type: Grant
    Filed: April 5, 1991
    Date of Patent: October 6, 1992
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Yuji Tokunaga, Takao Yamamoto, Takehisa Hata
  • Patent number: 5045553
    Abstract: The present invention relates to a pharmaceutical composition for percutaneous drug absorption which comprises 5-isopropyl 3-methyl 2-cyano-6-methyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate, and ethanol and/or an unsaturated higher fatty acid and to a composition of matter which comprises ethanol and/or an unsaturated higher fatty acid and is capable of promoting percutaneous absorption of said dihydropyridine compound.
    Type: Grant
    Filed: June 17, 1988
    Date of Patent: September 3, 1991
    Assignee: Fujisawa Pharmaceutical Company, Ltd.
    Inventors: Yoshio Ueda, Takehisa Hata, Rinta Ibuki, Kazutake Kado, Hiroshi Ishikuro
  • Patent number: 4871549
    Abstract: The invention relates to a Time-Controlled Explosion System in which drug release is caused by explosion of a membrane after a definite time period, said System comprising a preparation in the form of a bead or granule, said preparation comprising a core, a drug, swelling agent and an outer membrane of water-insoluble coating material.
    Type: Grant
    Filed: July 10, 1986
    Date of Patent: October 3, 1989
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Yoshio Ueda, Takehisa Hata, Hisami Yamaguchi, Satoshi Ueda, Masateru Kodani
  • Patent number: 4808416
    Abstract: The invention concerns the preparation of a slow-release drug characterized by the coating of a core comprising a therapeutically active principle by means of a substance which retards its release and by means of an additional layer consisting of an enteric substance.
    Type: Grant
    Filed: July 9, 1987
    Date of Patent: February 28, 1989
    Assignee: Laboratories Delagrange
    Inventors: Takehisa Hata, Hisami Yamaguchi, Satoshi Ueda, Masateru Kodani
  • Patent number: 4695466
    Abstract: The present invention relates to a multiple soft capsule in which a soft capsule is contained in another soft capsule and the production thereof. The multiple soft capsule is useful for various industrial fields such as medicine, foods, table luxuries and the like. Especially, the multiple capsule is useful in medical field, for instance, in combining two or more components which cannot be enclosed together in a single capsule or in the dissolution control in vivo of the medicines by properly selecting the kind of the film-forming substance for the outer and inner soft capsules.
    Type: Grant
    Filed: November 18, 1986
    Date of Patent: September 22, 1987
    Assignees: Morishita Jintan Co., Ltd., Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Takashi Morishita, Takehisa Hata, Mitio Mori, Shohachi Tanoue
  • Patent number: 4690816
    Abstract: A soft capsule which is prepared by wrapping an oily substance which is a member selected from the group consisting of tricaprylic acid glyceride and sesame oil, with a gelatin film containing sodium picosulfate.
    Type: Grant
    Filed: November 18, 1985
    Date of Patent: September 1, 1987
    Assignees: Fujisawa Pharmaceutical Co., Ltd., Morishita Jintan Co., Ltd.
    Inventors: Takehisa Hata, Nobuto Kanagawa, Takashi Morishita, Toshiyuki Suzuki
  • Patent number: 4428951
    Abstract: The present invention relates to a long active pharmaceutical composition of Tiaramide or its pharmaceutically acceptable salt which comprises Tiaramide or its pharmaceutically acceptable salt as an active ingredient and a water particularly insoluble substance which melts with warming or heating.
    Type: Grant
    Filed: April 22, 1982
    Date of Patent: January 31, 1984
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Takehisa Hata, Kenichi Nishimura, Mitsuru Yasumura