Patents by Inventor Yasuto Koyama

Yasuto Koyama 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).

  • Pharmaceutical composition
    Patent number: 5955469
    Abstract: A pharmaceutical emulsion composition or solution composition in an organic solvent containing a compound represented by the following chemical formula and having immunosuppressive activity is disclosed: ##STR1##
    Type: Grant
    Filed: July 25, 1994
    Date of Patent: September 21, 1999
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Sotoo Asakura, Michiyo Fukae, Shigeo Nakanishi, Yasuto Koyama, Youhei Kiyota
  • Aqueous liquid composition for external use
    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
  • Suspendible composition and process for preparing the same
    Patent number: 5496564
    Abstract: A suspendible composition comprising a tricyclic compound such as FK 506 substance which is 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 the like, and a pharmaceutically acceptable surfactant, which can be used as an orally administrable agent or eye drops and is useful for treating various diseases.
    Type: Grant
    Filed: August 26, 1994
    Date of Patent: March 5, 1996
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Sotoo Asakura, Yasuto Koyama, Youhei Kiyota, Kiyoko Akashi, Akira Kagayama, Yoshio Murakami, Toshiomi Nakate
  • Suspendible composition and process for preparing the same
    Patent number: 5368865
    Abstract: A suspendible composition comprising a tricyclic compound such as FK 506 substance which is 17-allyl-1,14-dihydroxy-12-[2-(4-hydroxy-3-methoxycyclohexyl)-1-methylviny 1]-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 the like, and a pharmaceutically acceptable surfactant, which can be used as an orally administrable agent or eye drops and is useful for treating various diseases.
    Type: Grant
    Filed: July 27, 1993
    Date of Patent: November 29, 1994
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Sotoo Asakura, Yasuto Koyama, Youhei Kiyota, Kiyoko Akashi, Akira Kagayama, Yoshio Murakami, Toshiomi Nakate
  • 3,7,11,11-Tetramethyl-spiro-[5,5]undeca-8-ene-1-one
    Patent number: 4052457
    Abstract: A novel spiro compound, 3,7,11,11-tetramethyl-spiro[5,5]-undeca-8-ene-1-one for altering the flavor or aroma of tobacco products. The spiro compound is prepared by reacting pulegone and piperylene in a solvent in the presence of a Lewis acid catalyst.
    Type: Grant
    Filed: December 2, 1975
    Date of Patent: October 4, 1977
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Akira Nagakura, Michio Moroe, Yasuto Koyama, Haruki Kurihara