Patents by Inventor Philip B. Tollefsrud

Philip B. Tollefsrud 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).

  • Fission fragment excited laser system
    Patent number: 3952263
    Abstract: A laser system and method for exciting lasing action in a molecular gas lasing medium which includes cooling the lasing medium to a temperature below about 150 K and injecting fission fragments through the lasing medium so as to preferentially excite low lying vibrational levels of the medium and to cause population inversions therein. The cooled gas lasing medium should have a mass areal density of about 5 .times. 10.sup.-.sup.3 grams/square centimeter, relaxation times of greater than 50 microseconds, and a broad range of excitable vibrational levels which are excitable by molecular collisions.
    Type: Grant
    Filed: October 4, 1974
    Date of Patent: April 20, 1976
    Assignee: The United States of America as represented by the United States Energy Research and Development Administration
    Inventors: David A. McArthur, Philip B. Tollefsrud