Topic leaderboard
Nuclear reactors
Ranked by the PatentIndex Score — a 1–99 percentile within G21C · public-visibility date · generated 2026-07-19
top 25 per window · public-visibility date
Rising· last 2 yrs
Inventors whose newest G21C patents became public in the last 2 years — the current frontier
- 199Kouji Hiraiwa9 patents · 220 citations
- 296Michael D. Heibel54 patents · 297 citations
- 392Edward J. Lahoda47 patents · 217 citations
- 488Ken Czerwinski8 patents · 86 citations
- 583Charles Gregory Freeman13 patents · 106 citations
- 679Shungo Sakurai5 patents · 122 citations
- 775Eric P. Loewen38 patents · 99 citations
- 871John D. Griffiths15 patents · 61 citations
- 967Hashem M. Hashemian10 patents · 43 citations
- 1063Gregory W. Morton9 patents · 40 citations
- 1158Holloway H. Frost10 patents · 26 citations
- 1254Rodolfo Vaghetto10 patents · 26 citations
- 1350Trevor D. Parker10 patents · 26 citations
- 1446Yassin A. Hassan10 patents · 26 citations
- 1542Jorge V. Carvajal24 patents · 46 citations
- 1638Brent D. Shumaker6 patents · 26 citations
- 1733Robert Stowers Reid10 patents · 37 citations
- 1829Joseph Rajkumar13 patents · 34 citations
- 1925Craig D. Gramlich12 patents · 30 citations
- 2021Stephen K. Rhyne8 patents · 14 citations
- 2117Patrick Ray Mcclure6 patents · 31 citations
- 2213Pavel Tsvetkov6 patents · 13 citations
- 238Calen Kaneko6 patents · 16 citations
- 244Seth Ryan Paul Strege11 patents · 21 citations
- 251Chelsea Ann Curtin5 patents · 18 citations
Active· last 5 yrs
Sustained G21C output across the last 5 years
- 199Stephen J. Agace20 patents · 306 citations
- 296Gerald A. Deaver38 patents · 552 citations
- 392Zeses Karoutas15 patents · 270 citations
- 488Kouji Hiraiwa9 patents · 220 citations
- 583Michael D. Heibel54 patents · 297 citations
- 679Lewis A. Walton23 patents · 218 citations
- 775Gerald M. Latter13 patents · 226 citations
- 871John T. Groome20 patents · 242 citations
- 967Jose N. Reyes, Jr.24 patents · 239 citations
- 1063Anselmo T. Cisneros, Jr.18 patents · 229 citations
- 1158Jeffery F. Latkowski15 patents · 210 citations
- 1254Jack T. Matsumoto32 patents · 290 citations
- 1350Edward J. Lahoda47 patents · 217 citations
- 1446Robert W. Whitling15 patents · 148 citations
- 1542Francesco Venneri12 patents · 168 citations
- 1638William A. Byers9 patents · 219 citations
- 1733Ken Czerwinski8 patents · 86 citations
- 1829Kevin Kramer14 patents · 141 citations
- 1925Jesse R. Cheatham, Iii16 patents · 106 citations
- 2021Charles Gregory Freeman13 patents · 106 citations
- 2117Ryan Abbott8 patents · 105 citations
- 2213James M. Vollmer7 patents · 93 citations
- 238Jon D. Mcwhirter38 patents · 158 citations
- 244Abdul R. Dulloo5 patents · 220 citations
- 251Shungo Sakurai5 patents · 122 citations
All-time canon
Career PatentIndex Score in G21C
- 199Daryl L. Harmon14 patents · 564 citations
- 296David S. Jamison14 patents · 564 citations
- 392Richard M. Manazir14 patents · 564 citations
- 488Robert L. Rescorl14 patents · 564 citations
- 583Kenneth Scarola15 patents · 563 citations
- 679Melvin H. Lipner6 patents · 542 citations
- 775Sam S. Palusamy5 patents · 810 citations
- 871John Geddes Erbes39 patents · 1,059 citations
- 967James E. Charnley17 patents · 455 citations
- 1063Lawrence E. Conway9 patents · 391 citations
- 1158Grant Clark Jensen40 patents · 759 citations
- 1254Larry E. Fennern22 patents · 636 citations
- 1350Eric B. Johansson52 patents · 1,299 citations
- 1446John F. Wilson44 patents · 737 citations
- 1542Bruce Matzner43 patents · 1,049 citations
- 1638Albert J. Impink, Jr.23 patents · 564 citations
- 1733Peter Louis Andresen17 patents · 473 citations
- 1829Alvin Radkowsky10 patents · 327 citations
- 1925Russell L. Crowther9 patents · 401 citations
- 2021Joseph S. Armijo11 patents · 410 citations
- 2117Edmund E. Demario26 patents · 606 citations
- 2213Anstein Hunsbedt13 patents · 413 citations
- 238Samson Hettiarachchi21 patents · 481 citations
- 244Stephen J. Agace20 patents · 306 citations
- 251Shunsuke Uchida14 patents · 438 citations
Rising· last 2 yrs
The top-scoring G21C patents made public in the last 2 years
- 199US12176113B1✦ AIModerated nuclear reactor3 cites · 202480% earned
- 296US12327648B2✦ AIMolten salt reactor containment1 cites · 202546% earned
- 392US12249434B2✦ AIThermal expansion support system and methods of use thereof1 cites · 202467% earned
- 488US12421593B2Fiber reinforced multi-layered wear and corrosion coatings of zirconium alloy nuclear fuel1 cites · 202456% earned
- 583US12476017B2Modular radioisotope production capsules and related method1 cites · 202467% earned
- 679US12412677B2Methods of energy generation from a Thorium molten salt system0 cites · 20240% earned
- 775US12476015B2Method of constructing a nuclear reactor having reactor core and control elements supporte0 cites · 20240% earned
- 871US12424343B2Separation of actinium from an irradiated source material including thorium0 cites · 20240% earned
- 967US12537110B2Passive chemical injection system for controlling a nuclear reaction by delivering a neutr0 cites · 20240% earned
- 1063US12243660B2Detection apparatus comprising a resonant electrical circuit located within a nuclear fuel0 cites · 20240% earned
- 1158US12159727B2Functionally graded lattice cermet fuel structure with shape corresponding to a mathematic0 cites · 20240% earned
- 1254US12080436B2Thorium-based fuel design for pressurized heavy water reactors0 cites · 20240% earned
- 1350US12300399B2Storage system for radioactive nuclear waste with pressure surge protection0 cites · 20240% earned
- 1446US12280542B2Photon propagation modified additive manufacturing compositions and methods of additive ma0 cites · 20240% earned
- 1542US12444513B2Piping enhancement for backflow prevention in a multiple loop, metal cooled nuclear reacto0 cites · 20240% earned
- 1638US12116926B2Integrated system for converting nuclear energy into electrical, mechanical, and thermal e0 cites · 20240% earned
- 1733US12183473B2Method of magnetically removing an irradiated capsule from a burnable absorber rodlet0 cites · 20240% earned
- 1829US12315646B2Fuel assembly arrangement for retaining fuel rod end plug to bottom nozzle0 cites · 20240% earned
- 1925US12537111B2Closures for pressure vessels, and associated systems and methods0 cites · 20250% earned
- 2021US12120956B2Ion-enhanced thermoelectric generator0 cites · 20240% earned
- 2117US12597529B2Nuclear reactor protection systems and methods0 cites · 20240% earned
- 2213US12191043B2Structured plasma cell energy converter for a nuclear reactor0 cites · 20240% earned
- 238US12551922B2Methods for cold spraying nickel particles on a substrate0 cites · 20240% earned
- 244US12586691B2Network and information systems and methods for shipyard manufactured and ocean delivered 0 cites · 20240% earned
- 251US11977193B2Wireless power level and power distribution monitoring and control system for subcritical 0 cites · 20240% earned
Active· last 5 yrs
The top-scoring G21C patents of the last 5 years
- 199US11380450B2✦ AIMethods for airflow control in reactor passive decay heat removal using a damper10 cites · 202181% earned
- 296US11158432B1✦ AIHeat pipe reactor core and heat exchangers formation and deployment15 cites · 202189% earned
- 392US11488731B2✦ AIDirect reactor auxiliary cooling system for a molten salt nuclear reactor9 cites · 202181% earned
- 488US11443859B2Natural circulation heat removal system for a nuclear reactor with pile structure9 cites · 202287% earned
- 583US11373769B2Passive containment cooling system for a nuclear reactor10 cites · 202181% earned
- 679US11342085B2Integrated passive cooling containment structure for a nuclear reactor9 cites · 202181% earned
- 775US11545274B2Coolant cleanup and heat-sinking systems and methods of operating the same9 cites · 202181% earned
- 871US11417435B2Control drum for a mobile nuclear reactor9 cites · 202187% earned
- 967US11626213B2Sodium vaporizer and methods7 cites · 202179% earned
- 1063US11746550B2Modular manufacture, delivery, and assembly of nuclear reactor building systems5 cites · 202267% earned
- 1158US11289212B2Fission reactor with segmented cladding bodies having cladding arms with involute curve sh6 cites · 202174% earned
- 1254US11728060B1Separation apparatus for high-level nuclear waste4 cites · 202375% earned
- 1350US11875906B2Method of operating a nuclear power plant4 cites · 202382% earned
- 1446US11490576B2Modular kinematic and telemetry system for an irrigation system5 cites · 202284% earned
- 1542US11189383B2Processing ultra high temperature zirconium carbide microencapsulated nuclear fuel6 cites · 202174% earned
- 1638US11984231B2Nuclear reactor plant for housing nuclear reactor modules4 cites · 202267% earned
- 1733US11443862B2Storage system for radioactive nuclear waste with pressure surge protection4 cites · 202170% earned
- 1829US11923098B2Customizable thin plate fuel form and reactor core therefor4 cites · 202270% earned
- 1925US11842819B2Method for replacing a cesium trap and cesium trap assembly thereof4 cites · 202275% earned
- 2021US11726194B2Imaging apparatus not easily affected by radiation, and image display apparatus4 cites · 202182% earned
- 2117US12018779B2Stabilizing face ring joint flange and assembly thereof3 cites · 202380% earned
- 2213US12211627B2Evacuated containment vessel for nuclear reactor2 cites · 202358% earned
- 238US12249435B2Carbide-based fuel assembly for thermal propulsion applications2 cites · 202367% earned
- 244US11050094B1Molten salt compositions with enhanced heat transfer and reduced corrosion properties5 cites · 202184% earned
- 251US11990815B2Canned rotodynamic flow machine for a molten salt nuclear reactor and an active magnetic b3 cites · 202372% earned
All-time canon
The defining G21C patents of the whole record
- 199US5311562A✦ AIPlant maintenance with predictive diagnostics599 cites · 199495% earned
- 296US4504439A✦ AIGas cooled nuclear reactor345 cites · 198594% earned
- 392US6450104B1✦ AIModular observation crawler and sensing instrument and method for operating same295 cites · 200294% earned
- 488US5174164AFlexible cable276 cites · 199294% earned
- 583US4541055ALaser machining system216 cites · 198594% earned
- 679US4816208AAlarm management system210 cites · 198994% earned
- 775US3969077AAlkali metal leak detection method and apparatus198 cites · 197694% earned
- 871US6512345B2Apparatus for obstacle traversion185 cites · 200294% earned
- 967US4851183AUnderground nuclear power station using self-regulating heat-pipe controlled reactors171 cites · 198994% earned
- 1063US5610596ASystem for monitoring an industrial installation168 cites · 199794% earned
- 1158US5367612ANeurocontrolled adaptive process control system158 cites · 199490% earned
- 1254US4640437AInsulated container and insulating element therefor154 cites · 198794% earned
- 1350US4756875AApparatus for filtering water containing radioactive substances in nuclear power plants148 cites · 198894% earned
- 1446US5809099ALaser-guided underwater wall climbing robot for reactor pressure vessel inspection139 cites · 199893% earned
- 1542US6252923B1In-situ self-powered monitoring of stored spent nuclear fuel135 cites · 200193% earned
- 1638US4753771APassive safety system for a pressurized water nuclear reactor134 cites · 198893% earned
- 1733US5676520AMethod and apparatus for inhibiting oxidation in pumps for pumping molten metal134 cites · 199793% earned
- 1829US4780269AHorizontal modular dry irradiated fuel storage system130 cites · 198893% earned
- 1925US5963884APredictive maintenance system130 cites · 199993% earned
- 2021US5987399AUltrasensitive surveillance of sensors and processes124 cites · 199990% earned
- 2117US5852984AUnderwater vehicle and method of positioning same121 cites · 199893% earned
- 2213US4939964ALow-clearance pipe lathe120 cites · 199093% earned
- 238US5715178AMethod of validating measurement data of a process parameter from a plurality of individua119 cites · 199881% earned
- 244US5167010AExpert advice display processing system119 cites · 199293% earned
- 251US6975963B2Method and system for storing and reporting network performance metrics using histograms119 cites · 200493% earned
Rising· last 2 yrs
Assignees whose newest G21C patents became public in the last 2 years — the current frontier
- 199TOSHIBA KK169 patents · 2,653 citations
- 296FRAMATOME SA291 patents · 3,336 citations
- 392WESTINGHOUSE ELECTRIC CO LLC256 patents · 791 citations
- 488MITSUBISHI HEAVY IND LTD93 patents · 634 citations
- 583TERRAPOWER LLC83 patents · 470 citations
- 679ELECTRICITE DE FRANCE40 patents · 430 citations
- 775HOLTEC INTERNATIONAL44 patents · 137 citations
- 871HITACHI GE NUCLEAR ENERGY LTD64 patents · 139 citations
- 967NUSCALE POWER LLC72 patents · 221 citations
- 1063GE HITACHI NUCLEAR ENERGY AMERICAS LLC103 patents · 154 citations
- 1158KOREA HYDRO & NUCLEAR POWER CO28 patents · 68 citations
- 1254TEXAS THORIUM LLC10 patents · 26 citations
- 1350TRIAD NAT SECURITY LLC12 patents · 39 citations
- 1446BATTELLE ENERGY ALLIANCE LLC26 patents · 45 citations
- 1542BWXT ADVANCED TECH LLC30 patents · 31 citations
- 1638NUGEN LLC8 patents · 14 citations
- 1733SMR INVENTEC LLC33 patents · 40 citations
- 1829ANALYSIS AND MEASUREMENT SERVICES CORP8 patents · 23 citations
- 1925UT BATTELLE LLC16 patents · 21 citations
- 2021ABILENE CHRISTIAN UNIV9 patents · 11 citations
- 2117NAC INT INC7 patents · 11 citations
- 2213KEPCO NUCLEAR FUEL CO LTD31 patents · 11 citations
- 238GEORGIA TECH RES INST3 patents · 35 citations
- 244X ENERGY LLC10 patents · 6 citations
- 251HOWE IND LLC4 patents · 6 citations
Active· last 5 yrs
Sustained G21C output across the last 5 years
- 199US ENERGY359 patents · 5,559 citations
- 296HITACHI LTD342 patents · 5,563 citations
- 392TOSHIBA KK169 patents · 2,653 citations
- 488COMMISSARIAT ENERGIE ATOMIQUE332 patents · 4,058 citations
- 583KOREA ATOMIC ENERGY RES123 patents · 906 citations
- 679FRAMATOME SA291 patents · 3,336 citations
- 775WESTINGHOUSE ELECTRIC CO LLC256 patents · 791 citations
- 871MITSUBISHI HEAVY IND LTD93 patents · 634 citations
- 967GLOBAL NUCLEAR FUEL AMERICAS33 patents · 332 citations
- 1063TERRAPOWER LLC83 patents · 470 citations
- 1158ELECTRICITE DE FRANCE40 patents · 430 citations
- 1254ULTRA SAFE NUCLEAR CORP14 patents · 133 citations
- 1350HOLTEC INTERNATIONAL44 patents · 137 citations
- 1446HITACHI GE NUCLEAR ENERGY LTD64 patents · 139 citations
- 1542NUSCALE POWER LLC72 patents · 221 citations
- 1638HOLTEC INT INC13 patents · 61 citations
- 1733GE HITACHI NUCLEAR ENERGY AMERICAS LLC103 patents · 154 citations
- 1829BATTELLE MEMORIAL INSTITUTE10 patents · 63 citations
- 1925NASA6 patents · 64 citations
- 2021KOREA HYDRO & NUCLEAR POWER CO28 patents · 68 citations
- 2117GANESAN PALVANNANATHAN14 patents · 51 citations
- 2213BWXT MPOWER INC62 patents · 82 citations
- 238TEXAS THORIUM LLC10 patents · 26 citations
- 244TRIAD NAT SECURITY LLC12 patents · 39 citations
- 251TERRESTRIAL ENERGY INC6 patents · 50 citations
All-time canon
All-time PatentIndex Score in G21C
- 199WESTINGHOUSE ELECTRIC CORP1,118 patents · 22,508 citations
- 296COMBUSTION ENG317 patents · 6,872 citations
- 392US ENERGY359 patents · 5,559 citations
- 488ARCH DEV CORP5 patents · 544 citations
- 583GEN ELECTRIC840 patents · 16,593 citations
- 679HITACHI LTD342 patents · 5,563 citations
- 775TOSHIBA KK169 patents · 2,653 citations
- 871BABCOCK & WILCOX CO120 patents · 2,210 citations
- 967COMMISSARIAT ENERGIE ATOMIQUE332 patents · 4,058 citations
- 1063KRAFTWERK UNION AG159 patents · 2,090 citations
- 1158KOREA ATOMIC ENERGY RES123 patents · 906 citations
- 1254HOLTEC INTERNATIONAL INC15 patents · 443 citations
- 1350SIEMENS AG210 patents · 3,034 citations
- 1446FRAMATOME SA291 patents · 3,336 citations
- 1542B & W FUEL CO23 patents · 441 citations
- 1638HOCHTEMPERATUR REAKTORBAU GMBH82 patents · 1,057 citations
- 1733WESTINGHOUSE ELECTRIC CO LLC256 patents · 791 citations
- 1829US ARMY20 patents · 425 citations
- 1925ADVANCED NUCLEAR FUELS CORP13 patents · 353 citations
- 2021ATOMIC ENERGY AUTHORITY UK71 patents · 760 citations
- 2117SIEMENS POWER CORP49 patents · 872 citations
- 2213ELECTRIC POWER RES INST43 patents · 678 citations
- 238MPR ASSOCIATES INC20 patents · 376 citations
- 244BRITISH NUCLEAR FUELS PLC51 patents · 546 citations
- 251ASEA ATOM AB123 patents · 1,830 citations
90–99 field-defining50–89 strong<50 emergingearned by citationsfrom family breadth