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).
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Patent number: 6524556Abstract: 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: GrantFiled: November 28, 2001Date of Patent: February 25, 2003Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Saburo Murata, Fumio Shiomojo, Yuji Tokunaga, Takehisa Hata
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Publication number: 20020061906Abstract: 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: ApplicationFiled: November 28, 2001Publication date: May 23, 2002Applicant: FUJISAWA PHARMACEUTICAL CO., LTD.Inventors: Saburo Murata, Fumio Shiomojo, Yuji Tokunaga, Takehisa Hata
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Patent number: 6361760Abstract: 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: GrantFiled: April 22, 1998Date of Patent: March 26, 2002Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Saburo Murata, Fumio Shiomojo, Yuji Tokunaga, Takehisa Hata
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Patent number: 6346537Abstract: 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: GrantFiled: June 4, 1999Date of Patent: February 12, 2002Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Takehisa Hata, Yuji Tokunaga, Fumio Shimojo, Sumihisa Kimura, Takeo Hirose, Satoshi Ueda
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Patent number: 5939427Abstract: 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: GrantFiled: January 5, 1998Date of Patent: August 17, 1999Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Akira Kagayama, Sachiyo Tanimoto, Saburo Murata, Takehisa Hata
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Patent number: 5817333Abstract: 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: GrantFiled: May 22, 1995Date of Patent: October 6, 1998Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Akira Kagayama, Yuji Tokunaga, Atsunori Kaibara, Sachiyo Tanimoto, Takehisa Hata
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Patent number: 5770607Abstract: 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: GrantFiled: July 18, 1994Date of Patent: June 23, 1998Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Toshiyasu Honbo, Sachiyo Tanimoto, Hiromitsu Yoshida, Takehisa Hata, Sotoo Asakura, Yasuto Koyama, Youhei Kiyota
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Patent number: 5747069Abstract: A percutaneously absorbable preparation containing a drug and a percutaneous absorption accelerator comprising a monoglyceride and a fatty acid.Type: GrantFiled: March 15, 1996Date of Patent: May 5, 1998Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Sotoo Asakura, Sumihisa Kimura, Kazutake Kado, Yoshiko Ohishi, Takehisa Hata
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Patent number: 5683716Abstract: 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: GrantFiled: January 2, 1996Date of Patent: November 4, 1997Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Takehisa Hata, Fumio Shimojo, Kazutake Kado, Kyoko Ishii, Seiji Sawai
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Patent number: 5656663Abstract: 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: GrantFiled: December 28, 1994Date of Patent: August 12, 1997Assignee: Teijin LimitedInventors: Atsuo Hazato, Nobuaki Hanajima, Yuji Makino, Toshiaki Takeda, Tamotsu Koyama, Takehisa Hata, Sumihisa Kimura, Saburo Murata
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Patent number: 5654009Abstract: 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: GrantFiled: April 22, 1996Date of Patent: August 5, 1997Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Takehisa Hata, Akira Kagayama, Sumihisa Kimura, Satoshi Ueda, Saburo Murata
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Patent number: 5601844Abstract: 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: GrantFiled: May 18, 1995Date of Patent: February 11, 1997Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Akira Kagayama, Sumihisa Kimura, Saburo Murata, Sachiyo Tanimoto, Takehisa Hata
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Patent number: 5215995Abstract: 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: GrantFiled: April 2, 1992Date of Patent: June 1, 1993Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Toshiyasu Honbo, Takehisa Hata, Akihiro Ishino, Yoshiharu Tsuji
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Patent number: 5152999Abstract: 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: GrantFiled: April 5, 1991Date of Patent: October 6, 1992Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Yuji Tokunaga, Takao Yamamoto, Takehisa Hata
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Patent number: 5045553Abstract: 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: GrantFiled: June 17, 1988Date of Patent: September 3, 1991Assignee: Fujisawa Pharmaceutical Company, Ltd.Inventors: Yoshio Ueda, Takehisa Hata, Rinta Ibuki, Kazutake Kado, Hiroshi Ishikuro
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Patent number: 4871549Abstract: 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: GrantFiled: July 10, 1986Date of Patent: October 3, 1989Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Yoshio Ueda, Takehisa Hata, Hisami Yamaguchi, Satoshi Ueda, Masateru Kodani
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Patent number: 4808416Abstract: 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: GrantFiled: July 9, 1987Date of Patent: February 28, 1989Assignee: Laboratories DelagrangeInventors: Takehisa Hata, Hisami Yamaguchi, Satoshi Ueda, Masateru Kodani
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Patent number: 4695466Abstract: 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: GrantFiled: November 18, 1986Date of Patent: September 22, 1987Assignees: Morishita Jintan Co., Ltd., Fujisawa Pharmaceutical Co., Ltd.Inventors: Takashi Morishita, Takehisa Hata, Mitio Mori, Shohachi Tanoue
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Patent number: 4690816Abstract: 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: GrantFiled: November 18, 1985Date of Patent: September 1, 1987Assignees: Fujisawa Pharmaceutical Co., Ltd., Morishita Jintan Co., Ltd.Inventors: Takehisa Hata, Nobuto Kanagawa, Takashi Morishita, Toshiyuki Suzuki
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Patent number: 4428951Abstract: 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: GrantFiled: April 22, 1982Date of Patent: January 31, 1984Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Takehisa Hata, Kenichi Nishimura, Mitsuru Yasumura