Patents by Inventor Victor Wei-Chung Chang

Victor Wei-Chung Chang 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).

  • Pen injection device and method of using same
    Patent number: 8636689
    Abstract: Pen injection devices (10) and methods of using a pen injection device are disclosed. Pen injection devices include a sterile dual transfer spike assembly (150) including a dual transfer spike defining a fluidic pathway; a first cartridge assembly (12) including a first cartridge (20) containing a first substance; a second cartridge assembly (14) including a second cartridge (30) containing a second substance; a plunger rod (50) translatable in a first direction; and a biasing mechanism (60) configured to bias the plunger rod in a second direction opposite the first direction. Methods of using a pen injection device having a first container, a second container, a plunger rod, and a biasing mechanism include activating the pen injection device, thereby creating a fluidic pathway between the first container and the second container; and translating the plunger rod at least once, thereby transferring a first substance from one container to the other container to mix with a second substance.
    Type: Grant
    Filed: July 16, 2008
    Date of Patent: January 28, 2014
    Assignees: Amylin Pharmaceuticals, LLC, Astrazeneca Pharmaceuticals LP
    Inventors: Reynaldo B. Halili, Jr., Victor Wei-Chung Chang, Phillip A. Estepa, Tyler J. Holschlag, Philip J. Simpson, David G. Matsuura
  • Pen Injection Device and Method of Using Same
    Publication number: 20100298768
    Abstract: Pen injection devices (10) and methods of using a pen injection device are disclosed. Pen injection devices include a sterile dual transfer spike assembly (150) including a dual transfer spike defining a fluidic pathway; a first cartridge assembly (12) including a first cartridge (20) containing a first substance; a second cartridge assembly (14) including a second cartridge (30) containing a second substance; a plunger rod (50) translatable in a first direction; and a biasing mechanism (60) configured to bias the plunger rod in a second direction opposite the first direction. Methods of using a pen injection device having a first container, a second container, a plunger rod, and a biasing mechanism include activating the pen injection device, thereby creating a fluidic pathway between the first container and the second container; and translating the plunger rod at least once, thereby transferring a first substance from one container to the other container to mix with a second substance.
    Type: Application
    Filed: July 16, 2008
    Publication date: November 25, 2010
    Applicant: Amylin Pharmaceuticals, Inc.
    Inventors: Reynaldo B. Halili, JR., Victor Wei-Chung Chang, Phillip A. Estepa, Tyler J. Holschlag, Philip J. Simpson, David G. Matsuura