Patents by Inventor Joseph J. Bookstein

Joseph J. Bookstein 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).

  • Pressure responsive valve catheter
    Patent number: 5267979
    Abstract: A catheter for introducing material into the vascular system is provided. The catheter includes an elongated catheter body having a side wall defining a catheter lumen. The catheter body has a proximal portion. Material can be introduced into the catheter lumen at its proximal portion. The catheter body has a distal portion. The distal portion has a single wall in an exit zone. At least one pressure responsive exit is formed in the side wall of the distal portion of the catheter body. The pressure responsive exit permits material to exit from the catheter lumen in response to a pressure over a first predetermined amount while preventing material from entering into the catheter lumen at a pressure less than a second pre-determined amount.
    Type: Grant
    Filed: July 21, 1992
    Date of Patent: December 7, 1993
    Assignee: E-Z-Em, Inc.
    Inventors: William M. Appling, Eamonn Hobbs, Daniel K. Recinella, Arthur L. Zimmet, Joseph J. Bookstein
  • Pressure responsive valve catheter
    Patent number: 5250034
    Abstract: A catheter for introducing material into the vascular system is provided. The catheter includes an elongated catheter body having a side wall defining a catheter lumen. The catheter body has a proximal portion. Material can be introduced into the catheter lumen at its proximal portion. The catheter body has a distal portion. The distal portion has a single wall in an exit zone. At least one pressure responsive exit is formed in the side wall of the distal portion of the catheter body. The pressure responsive exit permits material to exit from the catheter lumen in response to a pressure over a first pre-determined amount while preventing material from entering into the catheter lumen at a pressure less than a second pre-determined amount.
    Type: Grant
    Filed: August 7, 1991
    Date of Patent: October 5, 1993
    Assignee: E-Z-EM, Inc.
    Inventors: William M. Appling, Famonn Hobbs, Daniel K. Recinella, Arthur L. Zimmet, Joseph J. Bookstein