Patents by Inventor Christopher D. Pierson

Christopher D. Pierson 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: 11904137
    Abstract: A method of making a needle guard includes providing a mold having a portion defining a volume, the volume being a hollow cylinder with non-uniform walls with a pair of slots therein, the slots being open at one end and closed at the other end, the pair of slots having a major portion of constant width. The walls are thicker at the other end than at the one end. The method includes filling the volume with polymer and releasing a molded part from said mold and cooling a molded part resulting from the filling and releasing such that temperature that the widths of the pair of slots is non-uniform after cooling. The needle guard has upper and lower jaws defining a channel and coming together at a hinge. A winged needle can be inserted between the jaws, with the wings of the winged needle passing through slots between the jaws.
    Type: Grant
    Filed: April 5, 2022
    Date of Patent: February 20, 2024
    Assignee: NxStage Medical, Inc.
    Inventors: James M. Brugger, Christopher D. Pierson, Steven C. Alford
  • Publication number: 20220288307
    Abstract: A method of making a needle guard includes providing a mold having a portion defining a volume, the volume being a hollow cylinder with non-uniform walls with a pair of slots therein, the slots being open at one end and closed at the other end, the pair of slots having a major portion of constant width. The walls are thicker at the other end than at the one end. The method includes filling the volume with polymer and releasing a molded part from said mold and cooling a molded part resulting from the filling and releasing such that temperature that the widths of the pair of slots is non-uniform after cooling. The needle guard has upper and lower jaws defining a channel and coming together at a hinge. A winged needle can be inserted between the jaws, with the wings of the winged needle passing through slots between the jaws.
    Type: Application
    Filed: April 5, 2022
    Publication date: September 15, 2022
    Applicant: NxStage Medical, Inc.
    Inventors: James M. BRUGGER, Christopher D. PIERSON, Steven C. ALFORD
  • Patent number: 11305059
    Abstract: A needle set includes a needle guard and a winged needle. The needle guard has upper and lower jaws, each of the upper and lower jaws defining a channel and coming together at a hinge. The upper and lower jaws are separated by slots in sides of the needle guard, which slots divide the sides into upper and lower side walls, respectively. The winged needle can be inserted between the upper and lower jaws, with wings of the winged needle passing through the slots. The hinge has an opening and a tube connected to the winged needle passes through the opening.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: April 19, 2022
    Assignee: NxStage Medical, Inc.
    Inventors: James M. Brugger, Christopher D. Pierson, Steven C. Alford
  • Publication number: 20180221592
    Abstract: A needle set includes a needle guard with upper and lower jaws each defining a channel and joined at a hinge. Each edge of the jaws is aligned with and spaced from a respective edge of the opposite jaw defining slots alongside walls of the jaws. A winged needle has a cannula, a hub with a pair of wings with a tube connected to the cannula by the hub. The hinge portion has an opening into which the tube is received, and the side walls are spaced apart to permit the hub to be received between the jaws with the wings in the slots. The slots progressively narrow to a first spacing that is narrower than a thickness of each wing at a point thereof, and thereafter expand linearly to a second spacing that is substantially equal to the thickness of the wings.
    Type: Application
    Filed: August 5, 2016
    Publication date: August 9, 2018
    Applicant: NxStage Medical, Inc.
    Inventors: James M. BRUGGER, Christopher D. PIERSON, Steven C. ALFORD
  • Patent number: D801524
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: October 31, 2017
    Assignee: NXSTAGE MEDICAL, INC.
    Inventors: James M. Brugger, Christopher D. Pierson, Steven C. Alford