Patents by Inventor Eugene F. Farrell

Eugene F. Farrell 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).

  • Process for preparing cathodochromic sodalite
    Patent number: 3932592
    Abstract: A process for preparing cathodochromic materials whereby coloration properties of the materials are enhanced by a low-temperature re-crystallization process. Crystalline powders formed using either hydrothermal or sintering growth techniques are hydrothermally re-crystallized at a temperature sufficiently high and for a time sufficiently long to effect re-crystallization. The temperature range for hydrothermal re-crystallization is 60.degree.C to 300.degree.C and the re-crystallization growth time is at least the order of 12 hours and, more typically, the order of three days. There is shown a cathode ray tube employing said materials.
    Type: Grant
    Filed: April 1, 1974
    Date of Patent: January 13, 1976
    Assignee: Massachusetts Institute of Technology
    Inventors: Lee T. Todd, Jr., Eugene F. Farrell, Arthur Linz