G21
Nuclear physics
Official title: Nuclear physics; nuclear engineering
G21 (Nuclear physics) appears on 24,763 US grants and 18,035 published applications in this corpus.
Search patents in G21- Granted patents
- 24,763
- Published applications
- 18,035
- Assignees
- 5,740
- Inventors
- 40,434
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 491 | 0 |
| 1977 | 458 | 0 |
| 1978 | 430 | 0 |
| 1979 | 266 | 0 |
| 1980 | 365 | 0 |
| 1981 | 439 | 0 |
| 1982 | 330 | 0 |
| 1983 | 300 | 0 |
| 1984 | 377 | 0 |
| 1985 | 341 | 0 |
| 1986 | 449 | 0 |
| 1987 | 737 | 0 |
| 1988 | 541 | 0 |
| 1989 | 563 | 0 |
| 1990 | 465 | 0 |
| 1991 | 534 | 0 |
| 1992 | 509 | 0 |
| 1993 | 516 | 0 |
| 1994 | 509 | 0 |
| 1995 | 398 | 0 |
| 1996 | 402 | 0 |
| 1997 | 385 | 0 |
| 1998 | 449 | 0 |
| 1999 | 385 | 0 |
| 2000 | 303 | 0 |
| 2001 | 383 | 116 |
| 2002 | 405 | 379 |
| 2003 | 412 | 505 |
| 2004 | 363 | 525 |
| 2005 | 330 | 524 |
| 2006 | 355 | 552 |
| 2007 | 330 | 524 |
| 2008 | 327 | 552 |
| 2009 | 338 | 585 |
| 2010 | 383 | 705 |
| 2011 | 310 | 740 |
| 2012 | 419 | 755 |
| 2013 | 561 | 967 |
| 2014 | 726 | 896 |
| 2015 | 726 | 899 |
| 2016 | 739 | 859 |
| 2017 | 796 | 828 |
| 2018 | 705 | 891 |
| 2019 | 794 | 736 |
| 2020 | 837 | 910 |
| 2021 | 645 | 803 |
| 2022 | 736 | 818 |
| 2023 | 592 | 801 |
| 2024 | 622 | 833 |
| 2025 | 599 | 697 |
| 2026 | 388 | 635 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subclasses
Granted patents
- G21CNuclear reactors9,960
- G21KHandling of particles or ionising radiation not otherwise provided for7,627
- G21FProtection against x-radiation, gamma radiation, corpuscular radiation or particle bombardment5,312
- G21DNuclear power plant1,637
- G21GConversion of chemical elements1,246
- G21BFusion reactors961
- G21HObtaining energy from radioactive sources450
- G21JNuclear explosives24
Recent patents
- Power conversion system and flight vehicle6 Oct 2026US 12,752,924 B2Hitachi, Ltd.
- Steel plate composite wall panel structures, such as for use in nuclear reactor buildings, and associated systems and methods6 Oct 2026US 12,753,602 B2NuScale Power, LLC
- Nuclear reactor integrated oil and gas production systems and methods of operation6 Oct 2026US 12,753,674 B2Natura Resources LLC
- Tight connection device for the transfer of objects including a stub end provided with a release lug6 Oct 2026US 12,753,835 B2Getinge Life Science France
- Real-time change detection monitoring using isotopic ratio signatures6 Oct 2026US 12,754,332 B2UT-Battelle, LLC
- Sintering additives for improved microstructure control8 Oct 2026US 2026/0308070 A1UT-Battelle, LLC
- Method and apparatus for confining the spread of pollutants spilled into a moving fluid8 Oct 2026US 2026/0308859 A1
- Divertor gas puffing8 Oct 2026US 2026/0311894 A1Tokamak Energy Ltd
- System and method for forming inertial confinement fusion target capsules with engineered foam interior surfaces8 Oct 2026US 2026/0311895 A1Lawrence Livermore National Security, LLC
- Component for compressing matter8 Oct 2026US 2026/0311896 A1First Light Fusion Limited
Most cited
By later US patents
- Integrated variable-aperture collimator and fixed-aperture collimator1,021US 8,093,572 B2Accuray Incorporated · 2012
- Electronic conical collimator verification1,019US 8,675,820 B2Varian Medical Systems, Inc. · 2014
- Apparatus and method providing substantially two-dimensionally uniform irradiation542US 6,649,921 B1Fusion UV Systems, Inc. · 2003
- Photoelectric enhanced plasma glow discharge system and method including radiation means514US 4,664,769 AInternational Business Machines Corporation · 1987
- Method of handling radioactive alkali metal waste490US 4,234,449 AThe United States of America as represented by the United States Department of Energy · 1980