| 2025/0029,744 | SYSTEM AND METHOD FOR THERMIONIC ENERGY CONVERSION | Oct 07, 24 | Jan 23, 25 | Spark Thermionics, Inc. |
| 2024/0379,256 | SYSTEM AND METHOD FOR THERMIONIC ENERGY CONVERSION | Jan 12, 24 | Nov 14, 24 | Spark Thermionics, Inc. |
| 2024/0153,664 | DEVICES, SYSTEMS, AND METHODS FOR POWER GENERATION USING IRRADIATORS AND OTHER GAMMA RAY SOURCES | Feb 23, 22 | May 09, 24 | Westinghouse Electric Company LLC |
| 2024/0021,336 | SCALABLE RADIOISOTOPE POWER TILES | Jul 14, 22 | Jan 18, 24 | The Aerospace Corporation |
| 2023/0197,306 | FULLY CERAMIC ENCAPSULATED RADIOACTIVE HEAT SOURCE | Sep 16, 22 | Jun 22, 23 | Not available |
| 2022/0328,209 | Cooling Systems and Methods for Nuclear Thermionic Avalanche Cells | Apr 09, 21 | Oct 13, 22 | Not available |
| 2022/0139,588 | NUCLEAR BATTERY | Nov 04, 20 | May 05, 22 | Westinghouse Electric Company LLC |
| 2022/0115,159 | SYSTEM AND METHOD FOR THERMIONIC ENERGY CONVERSION | Dec 20, 21 | Apr 14, 22 | Not available |
| 2022/0108,814 | Surface Flashover and Material Texturing for Multiplying and Collecting Electrons for Nuclear Thermal Avalanche Cells and Nuclear Battery Devices | Oct 01, 21 | Apr 07, 22 | Not available |
| 2022/0037,047 | Diffusion Window For Radioactive Heat Source | Jan 15, 21 | Feb 03, 22 | Lockheed Martin Corporation |
| 2021/0350,947 | SYSTEM AND METHOD FOR THERMIONIC ENERGY CONVERSION | May 06, 21 | Nov 11, 21 | Not available |
| 2021/0257,122 | GENERATOR AND METHOD FOR USING SAME | Aug 21, 19 | Aug 19, 21 | Not available |
| 2021/0057,123 | Elements For Mitigating Electron Reflection and Vacuum Electronic Devices Incorporating Elements For Mitigating Electron Reflection | Aug 20, 20 | Feb 25, 21 | Not available |
| 2020/0373,035 | Multi-Layer Structure of Nuclear Thermionic Avalanche Cells | May 21, 20 | Nov 26, 20 | Not available |
| 2020/0152,344 | Nuclear Microbattery | Jul 23, 18 | May 14, 20 | Not available |
| 2020/0090,825 | DYNAMIC ISOTOPE BATTERY | Nov 25, 19 | Mar 19, 20 | Not available |
| 2020/0051,707 | TRIBOLUMINESCENCE ISOTOPE BATTERY | Oct 18, 19 | Feb 13, 20 | Not available |
| 2018/0158,560 | Nuclear radiation thermoelectron engine | Dec 03, 16 | Jun 07, 18 | Not available |
| 2016/0268,011 | INTERNALLY HEATED CONCENTRATED SOLAR POWER (CSP) THERMAL ABSORBER | May 26, 16 | Sep 15, 16 | THE BOEING COMPANY |
| 2016/0225,476 | NUCLEAR THERMIONIC AVALANCHE CELLS WITH THERMOELECTRIC (NTAC-TE) GENERATOR IN TANDEM MODE | Feb 03, 16 | Aug 04, 16 | UNITED STATES DEPARTMENT OF TRANSPORTATION AS REPRESENTED BY THE FEDERAL HIGHWAY ADMINISTRATION |