Patents by Inventor Takayuki Hagihara

Takayuki Hagihara 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: 5865799
    Abstract: A prefilled syringe capable of separate storage of different substances before use. It includes a tubular body having an injection needle at one end and a plunger at the other end, and a partition axially slidable in the tubular body. The partition includes a front part and a rear part independent of each other, and as a whole divides the interior space of the tubular body into a front compartment and a rear compartment in a sealing manner for storing mutually different substances. A bypass is disposed generally between the front and rear compartments to introduce the substance in the rear compartment into the front compartment when the partition is slid under pressure provided by the plunger to be adjacent to the bypass to thereby mix the substances immediately prior to injection.
    Type: Grant
    Filed: July 23, 1997
    Date of Patent: February 2, 1999
    Assignee: Takeda Chemical Industries
    Inventors: Nobuo Tanaka, Jotaro Kishimoto, Kotaro Wakamatsu, Takayuki Hagihara, Seiji Ohtani
  • Patent number: 5817056
    Abstract: A prefilled syringe capable of separate storage of different substances before use. It includes a tubular body having an injection needle at one end and a plunger at the other end, and a partition slidable axially in the tubular body. The partition includes a front part and a rear part independent of each other, and as a whole dividing the interior space of the tubular body into a front compartment and a rear compartment in a sealing manner for storing mutually different substances. A bypass is disposed generally between the front and rear compartments to introduce the substance in the rear compartment into the front compartment when the partition is slid under pressure provided by the plunger to be adjacent to the bypass to thereby mix the substances immediately prior to injection.
    Type: Grant
    Filed: September 11, 1996
    Date of Patent: October 6, 1998
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Nobuo Tanaka, Jotaro Kishimoto, Kotaro Wakamatsu, Takayuki Hagihara, Seiji Ohtani
  • Patent number: 5716339
    Abstract: A prefilled syringe is capable of separate storage of different substances before use. It includes a tubular body having an injection needle at one end and a plunger at the other end, and a partition axially slidable in the tubular body. The partition includes a front part and a rear part independent of each other, and as a whole divides the interior space of the tubular body into a front compartment and a rear compartment in a sealing manner for storing mutually different substances. A bypass is disposed generally between the front and rear compartments to introduce the substance in the rear compartment into the front compartment when the partition is slid under pressure provided by the plunger to be adjacent to the bypass to thereby mix the substances immediately prior to injection.
    Type: Grant
    Filed: September 19, 1995
    Date of Patent: February 10, 1998
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Nobuo Tanaka, Jotaro Kishimoto, Kotaro Wakamatsu, Takayuki Hagihara, Seiji Chtani
  • Patent number: 5605542
    Abstract: A prefilled syringe is capable of separate storage of different substances before use. It includes a tubular body having an injection needle at one end and a plunger at the other end, and a partition axially slidable in the tubular body. The partition includes a front part and a rear part independent of each other, and as a whole divides the interior space of the tubular body into a front compartment and a rear compartment in a sealing manner for storing mutually different substances. A bypass is disposed generally between the front and rear compartments to introduce the substance in the rear compartment into the front compartment when the partition is slid under pressure provided by the plunger to be adjacent to the bypass to thereby mix the substances immediately prior to injection.
    Type: Grant
    Filed: November 14, 1995
    Date of Patent: February 25, 1997
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Nobuo Tanaka, Jotaro Kishimoto, Kotaro Wakamatsu, Takayuki Hagihara, Seiji Ohtani