Patents by Inventor Takaaki Yoshinaga

Takaaki Yoshinaga 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).

  • Publication number: 20090105660
    Abstract: A syringe cylinder 12 includes a groove 32 formed in an inner peripheral surface thereof and extending over a predetermined length from an opening end 30 thereof. Even with the intermediate sliding stopper 14 located at a position where the groove 32 is formed, the pressure inside the syringe cylinder 12 can be reduced. Thus, during vacuum tapping, the intermediate sliding stopper 14 can be held in the vicinity of the opening end 30 of the syringe cylinder 12. Consequently, the intermediate sliding stopper 14 can be inserted into the syringe cylinder 12 in a correct posture and reliably moved to a predetermined position in the syringe cylinder 12.
    Type: Application
    Filed: February 23, 2007
    Publication date: April 23, 2009
    Applicant: Hisamitsu Pharmaceutical Co., Inc.
    Inventors: Kazunori Muta, Shigeo Ota, Takaaki Yoshinaga, Masakazu Shigiishi, Junichi Kubo, Nobuo Tsutsumi
  • Publication number: 20090004256
    Abstract: An adhesive patch for external use which is significantly inhibited from causing a rash, is less irritative to the skin, and sufficiently retains adhesion to the skin. The adhesive patch is characterized by employing a pressure-sensitive adhesive base into which a sucrose fatty acid ester has been incorporated. It does not exert physical influences on the skin, such as stresses imposed on the skin during wear and upon peeling, while sufficiently retaining adhesion to the skin. It is significantly inhibited from causing a rash, and the skin irritation thereof has been minimized. This adhesive patch for external use has ideal, lowly irritative properties which have been impossible to any conventional adhesive patch for external use.
    Type: Application
    Filed: August 26, 2008
    Publication date: January 1, 2009
    Applicant: Hisamitsu Pharmaceutical Co., Inc.
    Inventors: Takaaki Yoshinaga, Masato Wakamatsu, Masato Shirai, Masakazu Saeki
  • Publication number: 20080255521
    Abstract: In a prefilled syringe separately containing both a lidocaine solution and a hyaluronic acid solution, the viscosity of the hyaluronic acid solution is set so as to be sufficiently higher than the viscosity of the lidocaine solution. When lidocaine discharge from the tip of a hypodermic needle ends, the force f (N) required to discharge the hyaluronic acid solution from the needle tip suddenly increases, imparting sort of a jolt to the hand of the operator and creating a momentary sensation that the plunger is at rest. Letting the force f (N) required to discharge the lidocaine solution be P1 and the force f (N) required to discharge the hyaluronic acid solution be P2, the relationship therebetween is P1<P2. When (P2?P1)/P2>0.2, the operator is able to feel a sufficient jolt.
    Type: Application
    Filed: April 11, 2008
    Publication date: October 16, 2008
    Applicant: HISAMITSU PHARMACEUTICAL CO. INC,
    Inventors: Junichi Kubo, Takaaki Yoshinaga, Kazunori Muta, Tetsuro Tateishi
  • Publication number: 20080089925
    Abstract: An external preparation characterized by containing a pharmacologically active component such as an anti-inflammatory drug and an edetic acid salt, and containing substantially no water.
    Type: Application
    Filed: November 9, 2005
    Publication date: April 17, 2008
    Inventors: Masato Wakamatsu, Masakazu Saeki, Takaaki Yoshinaga
  • Publication number: 20070298089
    Abstract: An external preparation characterized by containing a pharmacologically active component such as an anti-inflammatory drug, and a lipophilic polyglycerin fatty acid ester.
    Type: Application
    Filed: November 9, 2005
    Publication date: December 27, 2007
    Inventors: Masakazu Saeki, Takaaki Yoshinaga, Masato Wakamatsu
  • Publication number: 20070077282
    Abstract: A pressure-sensitive adhesive composition which comprises three ingredients, i.e., polyisoprene, a styrene/isoprene/styrene copolymer, and solid polyisobutylene, in a proportion of (10-60)/(10-50)/(20-60) by weight and further contains a non-solid isobutylene polymer and a tackifier, characterized in that the amount of the non-solid isobutylene polymer is 1 to 30 pts. wt., excluding 30 pts. wt., per 100 pts. wt. of the sum of the three ingredients, i.e., the polyisoprene, styrene/isoprene/styrene copolymer, and solid polyisobutylene. When used in an adhesive patch for external use on the skin, the composition has satisfactory tackiness regardless of whether the temperature of the surrounding air is high or low, has excellent long-term storage stability, retains the necessary cohesive force, and does not unnecessarily irritate the skin.
    Type: Application
    Filed: October 20, 2004
    Publication date: April 5, 2007
    Inventors: Masato Shirai, Takaaki Yoshinaga, Masato Wakamatsu
  • Publication number: 20070036847
    Abstract: An adhesive patch for external use which is significantly inhibited from causing a rash, is less irritative to the skin, and sufficiently retains adhesion to the skin. The adhesive patch is characterized by employing a pressure-sensitive adhesive base into which a sucrose fatty acid ester has been incorporated. It does not exert physical influences on the skin, such as stresses imposed on the skin during wear and upon peeling, while sufficiently retaining adhesion to the skin. It is significantly inhibited from causing a rash, and the skin irritation thereof has been minimized. This adhesive patch for external use has ideal, lowly irritative properties which have been impossible to any conventional adhesive patch for external use.
    Type: Application
    Filed: September 3, 2004
    Publication date: February 15, 2007
    Applicant: Hisamitsu Phamaceutical Co., Inc.
    Inventors: Takaaki Yoshinaga, Masato Wakamatsu, Masato Shirai, Masakazu Saeki
  • Publication number: 20060188563
    Abstract: A medicinal oral preparation to be delivered to the large intestine comprising a core containing a pharmacologically active ingredient, an inner layer containing one or more cationic polymers and an outer layer containing one or more anionic polymers whereby the core is coated, which is designed so that, in a disintegration test successively consisting of a vertical movement for 2 hours in a first solution of pH 1.2, a vertical movement for 2 hours in a second solution of pH 7.4 and a vertical movement in a third solution of pH 6.4, the average disintegration initiation point and the average disintegration completion point each falls within a period from 35 minutes to 130 minutes after starting the vertical movement in the third solution.
    Type: Application
    Filed: March 27, 2003
    Publication date: August 24, 2006
    Applicant: HISAMITSU PHARMACEUTICAL CO., INC.
    Inventors: Shuji Sato, Takeshi Goto, Norifumi Tanida, Tatsuya Meno, Takaaki Yoshinaga, Keishi Yonemura
  • Publication number: 20030229048
    Abstract: Compositions for reducing an adverse skin reaction caused by a skin-irritating agent or skin sensitizing agent by treatment with a disaccharide and a metal ion, as well as methods for reducing an adverse skin reaction caused by a skin-irritating or skin-sensitizing agent, and methods for treating an inflammatory response to at least one inflammatory agent, by application of a disaccharide and/or metal ion composition.
    Type: Application
    Filed: April 30, 2003
    Publication date: December 11, 2003
    Inventors: Dange Veerapaneni, Kazutaka Inoue, Takaaki Yoshinaga, Munehiko Hirano, Shuji Sato
  • Patent number: D578210
    Type: Grant
    Filed: September 13, 2006
    Date of Patent: October 7, 2008
    Assignee: Hisamitsu Pharmaceutical Co., Inc.
    Inventors: Kazunori Muta, Shigeo Ohta, Takaaki Yoshinaga, Masakazu Shigiishi, Junichi Kubo, Nobuo Tsutsumi