Patents by Inventor Peter Dure-Smith

Peter Dure-Smith 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).

  • Bronchographic X-ray contrast method
    Patent number: 3937800
    Abstract: An X-ray contrast method containing as the essential radioopaque ingredient finely divided tantalum metal dispersed in a liquid vehicle having critical viscosity and flow properties. The metal has an average particle diameter in the range from about 0.5 to about 30 microns, and preferably in the range from about 1 to about 5 microns in a physiologically and pharmaceutically acceptable amount for use in obtaining X-ray films of sufficient clarity and detail for use in bronchography.
    Type: Grant
    Filed: April 3, 1974
    Date of Patent: February 10, 1976
    Inventors: Peter Dure-Smith, Roger L. Schnaare