Patents by Inventor John A. Swinton

John A. Swinton 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).

  • Filter device
    Patent number: 4188948
    Abstract: A filter device for connecting in series with a parenteral liquid administration line delivering a medical liquid to a patient. The filter unit includes a housing with a filter member that is previous to liquid but impervious to gas, and a gas collection chamber. A nonpuncturable hypodermic needle guide structure on the unit aligns a hypodermic needle with the gas collection chamber and limits cocking of the needle to prevent puncture or damage to the filter member.
    Type: Grant
    Filed: October 20, 1977
    Date of Patent: February 19, 1980
    Assignee: American Hospital Supply Corporation
    Inventor: John A. Swinton