Patents by Inventor John K. Casey

John K. Casey 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).

  • High pressure and high temperature production of diamonds
    Patent number: 7241434
    Abstract: The present invention is directed to a method for treating discolored natural diamond, especially Type IIa diamond and Type IaA/B diamond with nitrogen as predominantly B centers, for improving its color. The method includes preblocking and preshaping a discolored natural diamond to prevent its breakage in a high pressure/high temperature (HP/HT) press, placing said discolored natural diamond in a pressure transmitting medium which is consolidated into a pill. Next, the pill is placed into a HP/HT press at elevated pressure and elevated temperature within the graphite-stable or diamond-stable range of the carbon phase diagram for a time sufficient to improve the color of said diamond. Finally, the diamond is recovered from said press. Colorless and fancy colored diamonds can be made by this method.
    Type: Grant
    Filed: August 8, 2001
    Date of Patent: July 10, 2007
    Assignee: Bellataire International, LLC
    Inventors: Thomas R. Anthony, Yavuz Kadioglu, Suresh S. Vagarali, Steven W. Webb, William E. Jackson, William F. Banholzer, John K. Casey, Alan C. Smith