Patents by Inventor William W. Dupin

William W. Dupin 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).

  • Bottom blood bag separation system
    Patent number: 5154716
    Abstract: Plastic blood bag system including a bag having a generally longitudinal seal extending from the top of the bag and between two blood bag ports downwardly to at least the lower half of the bag but not to the bottom of the bag, thereby leaving the sole passageway within the bag and between two ports located in the lower half of the bag.
    Type: Grant
    Filed: November 6, 1990
    Date of Patent: October 13, 1992
    Assignee: Miles Inc.
    Inventors: Ronald H. Bauman, Donald R. Denton, William W. Dupin, Edward J. Nelson, Eva Sajan
  • Pivoting frangible valve for plastic bags
    Patent number: 4586928
    Abstract: Frangible valve for a closed plastic bag system comprising an upper member having a bore and located within a port on a plastic bag and a solid lower member extending into the bag. The lower member is attached to the upper member by at least one tether and includes a bore-sealing portion attached to the upper member via a weakened portion. In use, the bore-sealing portion is separated from the upper member by external manipulation to permit fluid flow through the bore while the bore-sealing portion remains tethered to the valve. In preferred embodiments, two tethers are included on opposite sides of the bore-sealing portion and the tethered bore-sealing portion includes means for keeping it separated from the bore in a fully open position after the bore seal has been broken.
    Type: Grant
    Filed: October 9, 1984
    Date of Patent: May 6, 1986
    Assignee: Miles Laboratories, Inc.
    Inventors: Bruce E. Barnes, William W. Dupin, Bruce W. Kuhlemann