Patents by Inventor William F. List

William F. List 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).

  • Apparatus for modifying the liquefication or solidification point of a gas
    Patent number: 4584689
    Abstract: An electric discharge gas laser utilizing a seedant material which is cooled prior to the main laser discharge. The seedant is ionized prior to the cooling process and prior to the main discharge, this pre-ionization maintaining the seedant material in a gaseous state even in view of the lowered temperature for a sufficient time so as to give the required ionization levels.
    Type: Grant
    Filed: March 17, 1980
    Date of Patent: April 22, 1986
    Assignee: Westinghouse Electric Corp.
    Inventors: William F. List, Ronald W. Minarik
  • Self-triggering circuit for gas-filled laser
    Patent number: 4071806
    Abstract: A self-triggering circuit for a gas-filled laser is disclosed. Electrical pulses which stimulate laser emission are applied to the laser cavity in response to an electrical energy change in the laser charging circuit when ionizing radiation is injected into the laser cavity. A semiconductor device of the type responsive to dv/dt, or of the type responsive to di/dt, is used as the self-triggering switch.
    Type: Grant
    Filed: September 2, 1976
    Date of Patent: January 31, 1978
    Assignee: Westinghouse Electric Corporation
    Inventor: William F. List