G21G
Conversion of chemical elements
Official title: CONVERSION OF CHEMICAL ELEMENTS; RADIOACTIVE SOURCES (applications of radiation in general G21H5/00; handling particles, e.g. neutrons, or electromagnetic radiation not otherwise provided for G21K)
G21G (Conversion of chemical elements) appears on 1,246 US grants and 1,501 published applications in this corpus.
Search patents in G21G- Granted patents
- 1,246
- Published applications
- 1,501
- Assignees
- 654
- Inventors
- 2,963
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 21 | 0 |
| 1977 | 15 | 0 |
| 1978 | 9 | 0 |
| 1979 | 4 | 0 |
| 1980 | 9 | 0 |
| 1981 | 14 | 0 |
| 1982 | 10 | 0 |
| 1983 | 6 | 0 |
| 1984 | 8 | 0 |
| 1985 | 2 | 0 |
| 1986 | 6 | 0 |
| 1987 | 10 | 0 |
| 1988 | 10 | 0 |
| 1989 | 13 | 0 |
| 1990 | 2 | 0 |
| 1991 | 10 | 0 |
| 1992 | 6 | 0 |
| 1993 | 8 | 0 |
| 1994 | 10 | 0 |
| 1995 | 8 | 0 |
| 1996 | 11 | 0 |
| 1997 | 6 | 0 |
| 1998 | 17 | 0 |
| 1999 | 13 | 0 |
| 2000 | 21 | 0 |
| 2001 | 20 | 5 |
| 2002 | 22 | 18 |
| 2003 | 19 | 42 |
| 2004 | 23 | 29 |
| 2005 | 13 | 27 |
| 2006 | 18 | 44 |
| 2007 | 14 | 25 |
| 2008 | 7 | 33 |
| 2009 | 23 | 43 |
| 2010 | 18 | 46 |
| 2011 | 18 | 59 |
| 2012 | 29 | 57 |
| 2013 | 32 | 73 |
| 2014 | 44 | 48 |
| 2015 | 43 | 48 |
| 2016 | 50 | 55 |
| 2017 | 47 | 78 |
| 2018 | 45 | 82 |
| 2019 | 58 | 71 |
| 2020 | 77 | 85 |
| 2021 | 50 | 90 |
| 2022 | 70 | 83 |
| 2023 | 64 | 80 |
| 2024 | 65 | 112 |
| 2025 | 82 | 105 |
| 2026 | 46 | 63 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- G21G 1/00Arrangements for converting chemical elements by electromagnetic radiation, corpuscular radiation or particle815
- G21G 4/00Radioactive sources601
- G21G 5/00Alleged conversion of chemical elements by chemical reaction7
- G21G 7/00Conversion of chemical elements not provided for in other groups of this7
Recent patents
- Fission product extraction system and methods of use thereof6 Oct 2026US 12,755,856 B2Abilene Christian University
- Materials and processes for generating radioisotopes6 Oct 2026US 12,755,857 B2AdvanCell IPCo US No. 1 Pty Ltd
- Purification process for the preparation of non-carrier added copper-6429 Sep 2026US 12,749,589 B2Curium US LLC
- Radio frequency quadrupole linear accelerator, neutron source system, and radio frequency quadrupole linear accelerator manufacturing method29 Sep 2026US 12,750,943 B2Riken
- Copper-64 compositions and purification processes for the preparation of novel copper-64 compositions15 Sep 2026US 12,735,327 B2Curium US LLC
- Production of highly purified 212pb8 Oct 2026US 2026/0311905 A1Sciencons AS
- Combined corrosion mitigation and hydrogen isotope extraction from molten salts1 Oct 2026US 2026/0301985 A1Battelle Savannah River Alliance, LLC
- Apparatus, system and method for radioisotope production using electrons1 Oct 2026US 2026/0301986 A1Full-Life Technology Europe
- Purification process for the preparation of non-carrier added copper-6417 Sep 2026US 2026/0279612 A1Curium US LLC
- Alpha-Emitting Isotope Generator and Method for Producing Alpha-Emitting Isotope17 Sep 2026US 2026/0279613 A1TAG1 Inc.
Most cited
By later US patents
- Endocurietherapy293US 5,342,283 A1994
- Method of treatment room selection verification in a radiation beam therapy system217US 5,260,581 ALoma Linda University Medical Center · 1993
- Hollow-tube brachytherapy device186US 5,713,828 AInternational Brachytherapy s.a. · 1998
- Radioactive medical device and process155US 6,010,445 AImplant Sciences Corporation · 2000
- X-ray-emitting interstitial implants149US 4,702,228 ATheragenics Corporation · 1987