Patents by Inventor Nobuo Kubota

Nobuo Kubota 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: 11400076
    Abstract: The object of the present invention is to provide a novel pharmaceutical for suppressing cancer stem cells. In the present invention, a mitochondria inhibitor comprising a 2-nitroimidazole derivative is applied to the cancer stem cell as an active ingredient.
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: August 2, 2022
    Assignees: KEIO UNIVERSITY, Sun Pharma Japan Limited
    Inventors: Hideyuki Saya, Oltea Sampetrean, Naoyoshi Koike, Nobuo Kubota
  • Patent number: 11090234
    Abstract: Provided is a product exhibiting good bubbles even from a screen foamer composition using a non-ionic surfactant. This foam contains a non-ionic surfactant and is composed of an air layer and a bubble shell encapsulating the air layer. The bubble shell has a high light transmission region which is optically transparent and a low light transmission region which is less optically transparent than the highlight transmission region, both regions being disposed so as to spread across a surface of the bubble shell in such a manner as to form an identifiable boundary therebetween; and when the foam is allowed to stand at 25° C., an area of the low light transmission region occupying the surface area of the bubble shell expands over time, and thus the entire surface of the bubble shell becomes occupied by the low light transmission region.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: August 17, 2021
    Assignee: POLA PHARMA INC.
    Inventors: Hirokazu Kobayashi, Takaaki Masuda, Nobuo Kubota, Kahori Fujii
  • Publication number: 20200316027
    Abstract: The object of the present invention is to provide a novel pharmaceutical for suppressing cancer stem cells. In the present invention, a mitochondria inhibitor comprising a 2-nitroimidazole derivative is applied to the cancer stem cell as an active ingredient.
    Type: Application
    Filed: October 2, 2018
    Publication date: October 8, 2020
    Applicant: KEIO UNIVERSITY
    Inventors: Hideyuki SAYA, Oltea SAMPETREAN, Naoyoshi KOIKE, Nobuo KUBOTA
  • Publication number: 20190133894
    Abstract: Provided is a product exhibiting good bubbles even from a screen foamer composition using a non-ionic surfactant. This foam contains a non-ionic surfactant and is composed of an air layer and a bubble shell encapsulating the air layer. The bubble shell has a high light transmission region which is optically transparent and a low light transmission region which is less optically transparent than the highlight transmission region, both regions being disposed so as to spread across a surface of the bubble shell in such a manner as to form an identifiable boundary therebetween; and when the foam is allowed to stand at 25° C., an area of the low light transmission region occupying the surface area of the bubble shell expands over time, and thus the entire surface of the bubble shell becomes occupied by the low light transmission region.
    Type: Application
    Filed: June 9, 2017
    Publication date: May 9, 2019
    Inventors: Hirokazu KOBAYASHI, Takaaki MASUDA, Nobuo KUBOTA, Kahori FUJII
  • Patent number: 10130610
    Abstract: In a pharmaceutical composition for external use containing a compound such as luliconazole and/or a salt thereof in an amount of 5% by mass or more, comprised is/are acetone, a polyoxyethylene alkyl (having 8 to 30 carbon atoms) ether, and/or a polyoxyethylene alkenyl (having 8 to 30 carbon atoms) ether. Provided is a preparation using a solvent other than crotamiton, propylene carbonate, and N-methyl-2-pyrrolidone as a solvent for solubilization and steric stabilization and having the following properties: 1) when a compound represented by the general formula (1) and/or a salt thereof has a stereoisomer, the amount of the stereoisomer of the compound and/or a salt thereof produced under a preservation condition of 60° C. for 3 weeks is 1% by mass or less with respect to the total mass of the compound and/or a salt thereof at the beginning of preservation; 2) the preparation is in a clear liquid state when preserved at a constant temperature of 20° C.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: November 20, 2018
    Assignees: Pola Pharma Inc., Nihon Nohyaku Co., Ltd.
    Inventors: Hirokazu Kobayashi, Eiko Kosugi, Nobuo Kubota
  • Patent number: 9491933
    Abstract: The invention can produce an infected nail of an animal and an infected animal model in which the nail plate and nail bed of the nail are sufficiently infected with a superficial fungus which were difficult to be produced in the past, and provides an evaluation method useful for development of a therapeutic agent for intractable infectious diseases such as tinea unguium using the nail and the infected animal model. For producing the infected nail of an animal and the infected animal model infected with a superficial fungus, an immunosuppressive component is administered to an animal in advance to decrease immunocompetence, and then, a superficial fungus is inoculated into the animal, whereby the infected nail of an animal and the infected animal model reflecting clinical manifestation in which the nail plate and nail bed of the nail are sufficiently infected with the superficial fungus can be produced with good reproducibility in a short period of time.
    Type: Grant
    Filed: December 25, 2008
    Date of Patent: November 15, 2016
    Assignee: POLA PHARMA, INC.
    Inventors: Nobuo Kubota, Tsuyoshi Shimamura, Saori Nagasaka
  • Patent number: 9050271
    Abstract: In a pharmaceutical composition for external use containing a compound such as luliconazole and/or a salt thereof, comprised are a higher alcohol which is in a liquid state at 1 atm and 25° C. and/or a diester of a dibasic acid, provided that a diester carbonate is excluded, and a polyoxyethylene alkyl ether and/or a polyoxyethylene alkenyl ether. Provided is a preparation using a solvent other than crotamiton, propylene carbonate, and N-methyl-2-pyrroridone as a solvent for solubilization and steric stabilization and having the following properties: 1) when a compound represented by the general formula (1) and/or a salt thereof has a stereoisomer, the amount of the stereoisomer of the compound and/or a salt thereof produced under a preservation condition of 60 degrees C. for 3 weeks is 1% by mass or less with respect to the total mass of the compound and/or a salt thereof at the beginning of preservation; 2) the preparation is in a clear liquid state when preserved at a constant temperature of 20° C.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: June 9, 2015
    Assignees: POLA PHARMA INC., NIHON NOHYAKU CO., LTD.
    Inventors: Hirokazu Kobayashi, Eiko Kosugi, Nobuo Kubota
  • Patent number: 8962669
    Abstract: An object is to provide a medicament preparation which is excellent in the solubilization stability in relation to a compound represented by the general formula (1) during the storage in a low temperature region and a high temperature region. The present invention resides in a pharmaceutical composition comprising 1) the compound represented by the general formula (1) and/or a salt thereof and 2) a polyhydric alcohol derivative. General formula (1) (In the formula, R1, R2 independently represent hydrogen atom or halogen atom respectively, and at least one of R1, R2 is halogen atom.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: February 24, 2015
    Assignees: Pola Pharma Inc., Nihon Nohyaku Co., Ltd.
    Inventors: Nobuo Kubota, Hirokazu Kobayashi, Takaaki Masuda
  • Patent number: 8952044
    Abstract: A pharmaceutical composition which comprises 1) a compound represented by the following general formula (1) and/or a salt thereof; and 2) a ketone such as methyl ethyl ketone. Preferably, the compound represented by the following general formula (1) is luliconazole, where R1?R2=a chlorine atom: where R1 and R2 each independently represents a hydrogen atom or a halogen atom, and at least one of R1 and R2 represents a halogen atom. The present invention provides a preparation excellent in solubilization stability for a compound represented by the general formula (1) and/or a salt thereof in low-temperature or high-temperature storage.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: February 10, 2015
    Assignees: Pola Pharma Inc., Nihon Nohyaku Co., Ltd.
    Inventors: Hirokazu Kobayashi, Nobuo Kubota
  • Patent number: 8541459
    Abstract: To provide a pharmaceutical composition which can enhance the storage stability of 1-(1-hydroxymethyl-2,3-dihydroxypropyloxymethyl)-2-nitroimidazole without impairing the effect of the compound. The pharmaceutical composition includes 1-(1-hydroxymethyl-2,3-dihydroxypropyloxymethyl)-2-nitroimidazole, which is represented by formula (1): and a compound having chelating ability.
    Type: Grant
    Filed: January 17, 2008
    Date of Patent: September 24, 2013
    Assignee: Pola Pharma Inc.
    Inventors: Yasushi Murakami, Naoko Kobayashi, Azuma Nishio, Nobuo Kubota
  • Patent number: 8450356
    Abstract: To provide a pharmaceutical composition which can enhance the storage stability of 1-(1-hydroxymethyl-2,3-dihydroxypropyloxymethyl)-2-nitroimidazole without impairing the effect of the compound. The pharmaceutical composition includes 1-(1-hydroxymethyl-2,3-dihydroxypropyloxymethyl)-2-nitroimidazole, which is represented by formula (1): and a compound having chelating ability.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: May 28, 2013
    Assignee: Pola Pharma Inc.
    Inventors: Yasushi Murakami, Naoko Kobayashi, Azuma Nishio, Nobuo Kubota
  • Patent number: 8420687
    Abstract: To provide a pharmaceutical composition which can enhance the storage stability of 1-(1-hydroxymethyl-2,3-dihydroxypropyloxymethyl)-2-nitroimidazole without impairing the effect of the compound. The pharmaceutical composition includes 1-(1-hydroxymethyl-2,3-dihydroxypropyloxymethyl)-2-nitroimidazole, which is represented by formula (1): and a compound having chelating ability.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: April 16, 2013
    Assignee: Pola Pharma Inc.
    Inventors: Yasushi Murakami, Naoko Kobayashi, Azuma Nishio, Nobuo Kubota
  • Publication number: 20130090365
    Abstract: An object is to provide a medicament preparation which is excellent in the solubilization stability in relation to a compound represented by the general formula (1) during the storage in a low temperature region and a high temperature region. The present invention resides in a pharmaceutical composition comprising 1) the compound represented by the general formula (1) and/or a salt thereof and 2) a polyhydric alcohol derivative. General formula (1) (In the formula, R1, R2 independently represent hydrogen atom or halogen atom respectively, and at least one of R1, R2 is halogen atom.
    Type: Application
    Filed: June 10, 2011
    Publication date: April 11, 2013
    Applicants: NIHON NOHYAKU CO., LTD., POLA PHARMA INC.
    Inventors: Nobuo Kubota, Hirokazu Kobayashi, Takaaki Masuda
  • Publication number: 20130011351
    Abstract: In a pharmaceutical composition for external use containing a compound such as luliconazole and/or a salt thereof in an amount of 5% by mass or more, comprised is/are acetone, a polyoxyethylene alkyl (having 8 to 30 carbon atoms) ether, and/or a polyoxyethylene alkenyl (having 8 to 30 carbon atoms) ether. Provided is a preparation using a solvent other than crotamiton, propylene carbonate, and N-methyl-2-pyrrolidone as a solvent for solubilization and steric stabilization and having the following properties: 1) when a compound represented by the general formula (1) and/or a salt thereof has a stereoisomer, the amount of the stereoisomer of the compound and/or a salt thereof produced under a preservation condition of 60° C. for 3 weeks is 1% by mass or less with respect to the total mass of the compound and/or a salt thereof at the beginning of preservation; 2) the preparation is in a clear liquid state when preserved at a constant temperature of 20° C.
    Type: Application
    Filed: April 9, 2010
    Publication date: January 10, 2013
    Applicants: Pola Pharma Inc., Nihon Nohyaku Co., Ltd.
    Inventors: Hirokazu Kobayashi, Eiko Kosugi, Nobuo Kubota
  • Patent number: 8268876
    Abstract: Provided is a pharmaceutical composition for external use, including: (i) luliconazole represented by the following structural formula (1) and/or a salt thereof; and (ii) ?-hydroxycarboxylic acid and/or a salt thereof.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: September 18, 2012
    Assignees: Nihon Nohyaku Co., Ltd., Pola Pharma Inc.
    Inventors: Toyohiko Miki, Akira Nozawa, Nobuo Kubota, Susumu Tomiyama, Hirokazu Kobayashi
  • Patent number: 8258166
    Abstract: A Cancer radiotherapeutic method using 1-(1-hydroxymethyl-2,3-dihydroxypropyl)oxymethyl-2-nitroimidazole (compound (i), and creatinine in an amount of 0.001 to part by mass with respect to 1 part by mass of compound (1); and irradiation.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: September 4, 2012
    Assignee: Pola Pharma Inc.
    Inventors: Yasushi Murakami, Naoko Kobayashi, Azuma Nishio, Nobuo Kubota
  • Patent number: 8258165
    Abstract: To provide a pharmaceutical composition containing a 2-nitroimidazole derivative, which has high solubility in an aqueous carrier and high stability. The pharmaceutical composition is characterized by containing 1-(1-hydroxymethyl-2,3-dihydroxypropyl)oxymethyl-2-nitroimidazole and creatinine, and containing creatinine of 0.001 to 1 part by mass with respect to 1 part by mass of 1-(1-hydroxymethyl-2,3-dihydroxypropyl)oxymethyl-2-nitroimidazole.
    Type: Grant
    Filed: April 16, 2008
    Date of Patent: September 4, 2012
    Assignee: Pola Pharma Inc.
    Inventors: Yasushi Murakami, Naoko Kobayashi, Azuma Nishio, Nobuo Kubota
  • Patent number: 8202898
    Abstract: To provide a pharmaceutical composition containing a 2-nitroimidazole derivative, which has high solubility in an aqueous carrier and high stability. The pharmaceutical composition is characterized by containing 1-(1-hydroxymethyl-2,3-dihydroxypropyl)oxymethyl-2-nitroimidazole and creatinine, and containing creatinine of 0.001 to 1 part by mass with respect to 1 part by mass of 1-(1-hydroxymethyl-2,3-dihydroxypropyl)oxymethyl-2-nitroimidazole.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: June 19, 2012
    Assignee: Pola Pharma Inc.
    Inventors: Yasushi Murakami, Naoko Kobayashi, Azuma Nishio, Nobuo Kubota
  • Publication number: 20120149745
    Abstract: A pharmaceutical composition which comprises 1) a compound represented by the following general formula (1) and/or a salt thereof; and 2) a ketone such as methyl ethyl ketone. Preferably, the compound represented by the following general formula (1) is luliconazole, where R1?R2=a chlorine atom: where R1 and R2 each independently represents a hydrogen atom or a halogen atom, and at least one of R1 and R2 represents a halogen atom. The present invention provides a preparation excellent in solubilization stability for a compound represented by the general formula (1) and/or a salt thereof in low-temperature or high-temperature storage.
    Type: Application
    Filed: July 29, 2010
    Publication date: June 14, 2012
    Applicants: NIHON NOHYAKU CO., LTD., POLA PHARMA INC.
    Inventors: Hirokazu Kobayashi, Nobuo Kubota
  • Publication number: 20120136295
    Abstract: To provide a pharmaceutical composition containing a 2-nitroimidazole derivative, which has high solubility in an aqueous carrier and high stability. The pharmaceutical composition is characterized by containing 1-(1-hydroxymethyl-2,3-dihydroxypropyl)oxymethyl-2-nitroimidazole and creatinine, and containing creatinine of 0.001 to 1 part by mass with respect to 1 part by mass of 1-(1-hydroxymethyl-2,3-dihydroxypropyl)oxymethyl-2-nitroimidazole.
    Type: Application
    Filed: February 3, 2012
    Publication date: May 31, 2012
    Applicant: POLA PHARMA INC.
    Inventors: Yasushi MURAKAMI, Naoko Kobayashi, Azuma Nishio, Nobuo Kubota