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Patents

  1. Conversano, R. W., Goebel, D. M., Katz, I., and Hofer, R. R., "Low-Power Hall Thruster with an Internally Mounted Low-Current Hollow Cathode," United States Patent No. 10,919,649 (Feb. 16, 2021).
  2. Conversano, R., Goebel, D. M., Katz, I., Hofer, R. R., “Low-power Hall thruster with an Internally Mounted Low-current Hollow Cathode,” United States Patent No. 10,723,489 (July 28, 2020).
  3. Hofer, R. R., Jorns, B. A., Brophy, J. R., and Katz, I., "Hall Effect Thruster Electrical Configuration," United States Patent No. 10,480,493 (Nov. 19, 2019).
  4. Goebel, D. M., Hofer, R. R., and Mikellides I. M., “Metallic Wall Hall Thrusters,” United States Patent No. 9,874,202 (January 23, 2018).
  5. Hofer, R. R., Bickler, D., and D’Agostino, S., “Pulsed Plasma Lubrication Device and Method,” United States Patent No. 9,488,312 (Nov. 8, 2016).
  6. Goebel, D. M., Hofer, R. R., and Mikellides I. M., “Metallic Wall Hall Thrusters,” United States Patent No. 9,453,502 (September 27, 2016).
  7. Hofer, R. R., "Magnetically-Conformed, Variable Area Discharge Chamber for Hall Thruster, and Method," United States Patent No. 8,407,979 (April 2, 2013).
  8. Hofer, R. R., Goebel, D. M., and Watkins, R. M., "Compact High-Current Rare-Earth Emitter Hollow Cathode for Hall Effect Thrusters," United States Patent No. 8,143,788 (Mar. 27, 2012).
  9. C. Jung-Kubiak, C. M. Marrese-Reading, V. E. White, D. W. Wilson, M. R. Dickie, K. Y. Yee, R. E. Muller, J. E. Polk, J. R. Anderson, N. Rouhi, F. Greer, “Micro-Emitters for Electrospray Systems,” United States Patent Number No. 10,384,810 (Aug. 20, 2019).
  10. C. Marrese-Reading, J. Mueller, and W.C. West, “Microfluidic Electrospray Thruster,” United States Patent No. 8,850,792 (Oct. 7, 2014).
  11. David Y Oh, Dan M Goebel, Christopher B Stell, Gregory A Carr, Peter W Lord, Lee Rotlisburger, Denis Trofimov, Jorge Delgado, Bao Hoang, “Power Train for Deep Space Solar Electric Propulsion,” U.S.#10,954,005 (Mar. 23, 2021).
  12. Goebel, D.M. “Hall thruster with magnetic discharge chamber and conductive coating,” U.S.#10,082,133 (Sept.25, 2018).
  13. Conversano, R.W., Goebel, D.M., and Becatti, G. “Heaterless Hollow Cathode,” United States Patent Number 11,482,395 (Oct. 25, 2022).
  14. Guerrero Vela, P. P. and Polk; J. E. “Method and Apparatus for Reducing the Work Function of Polycrystalline Metal Hexaboride.” United States Patent No. 20220328274 (Oct 13, 2022).

CL#24-0850