Patents by Inventor Ralph Ostensen

Ralph Ostensen 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).

  • Vented anti-reflux valve
    Patent number: 4725268
    Abstract: A combination anti-reflux valve and gas venting device for use in a urinary drainage bag is described. In the preferred embodiment, the device is made of a flapper valve having a gas venting portion inside the urinary drainage bag. The flapper valve is connected to a gas venting connector means for passage of gas between the outside and inside connector means.
    Type: Grant
    Filed: June 25, 1986
    Date of Patent: February 16, 1988
    Assignee: Baxter Travenol Laboratories, Inc.
    Inventors: Ralph Ostensen, Mark McGlothlin