Patents by Inventor Roger M. Eastin

Roger M. Eastin 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).

  • Method of preparing electron emissive coatings for electric discharge devices
    Patent number: 4487589
    Abstract: An electric discharge type device is described having electrode means which include a refractory metal substrate having sintered thereon an open porous coating of refractory metal particles at a thickness up to about 1 millimeter thickness with electron emissive material being disposed in the pores of said sintered refractory metal coating. Representative electric discharge devices having said improved electrode means include discharge type electric lamps and photographic flash tubes wherein the electrode members have an elongated shaped body which is terminated at one end to provide more surface area for the coatings sintered thereon. Various electron emissive materials can be employed for impregnation of the open porous coating of refractory metal particles by such conventional techniques as dipping or spraying.
    Type: Grant
    Filed: June 13, 1983
    Date of Patent: December 11, 1984
    Assignee: General Electric Company
    Inventors: Amarendra Mishra, Dimitri M. Speros, Roger M. Eastin
  • Electron emissive coatings for electric discharge devices
    Patent number: 4415835
    Abstract: An electric discharge type device is described having electrode means which include a refractory metal substrate having sintered thereon an open porous coating of refractory metal particles at a thickness up to about 1 millimeter thickness with electron emissive material being disposed in the pores of said sintered refractory metal coating. Representative electric discharge devices having said improved electrode means include discharge type electric lamps and photographic flash tubes wherein the electrode members have an elongated shaped body which is terminated at one end to provide more surface area for the coatings sintered thereon. Various electron emissive materials can be employed for impregnation of the open porous coating of refractory metal particles by such conventional techniques as dipping or spraying.
    Type: Grant
    Filed: June 22, 1981
    Date of Patent: November 15, 1983
    Assignee: General Electric Company
    Inventors: Amarendra Mishra, Dimitri M. Speros, Roger M. Eastin