G21F 9/12
By absorption
Official title: by absorption; by adsorption; by ion-exchange
G21F9/12 (By absorption) appears on 523 US grants and 414 published applications in this corpus.
Search patents in G21F- Granted patents
- 523
- Published applications
- 414
- Assignees
- 335
- Inventors
- 1,401
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 5 | 0 |
| 1978 | 8 | 0 |
| 1979 | 6 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 6 | 0 |
| 1984 | 10 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 9 | 0 |
| 1988 | 5 | 0 |
| 1989 | 10 | 0 |
| 1990 | 10 | 0 |
| 1991 | 6 | 0 |
| 1992 | 12 | 0 |
| 1993 | 8 | 0 |
| 1994 | 9 | 0 |
| 1995 | 9 | 0 |
| 1996 | 8 | 0 |
| 1997 | 16 | 0 |
| 1998 | 20 | 0 |
| 1999 | 19 | 0 |
| 2000 | 10 | 0 |
| 2001 | 11 | 4 |
| 2002 | 11 | 7 |
| 2003 | 8 | 6 |
| 2004 | 7 | 10 |
| 2005 | 2 | 2 |
| 2006 | 11 | 8 |
| 2007 | 4 | 8 |
| 2008 | 1 | 5 |
| 2009 | 5 | 17 |
| 2010 | 13 | 7 |
| 2011 | 6 | 14 |
| 2012 | 7 | 22 |
| 2013 | 9 | 15 |
| 2014 | 16 | 26 |
| 2015 | 21 | 29 |
| 2016 | 24 | 29 |
| 2017 | 18 | 27 |
| 2018 | 19 | 26 |
| 2019 | 23 | 33 |
| 2020 | 21 | 21 |
| 2021 | 17 | 20 |
| 2022 | 21 | 18 |
| 2023 | 12 | 22 |
| 2024 | 10 | 15 |
| 2025 | 16 | 15 |
| 2026 | 11 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Layered absorbent substrate incorporating activated carbon and superabsorbent materials7 Jul 2026US 12,673,229 B2Star Liberty LLC
- Methods of use and manufacture of silver-doped, nano-porous hydroxyapatite9 Jun 2026US 12,649,143 B2Mo-Sci Corporation
- Granulated adsorbent and process of producing the same2 Jun 2026US 12,643,090 B2FUSO Corporation
- Chitosan-titanium composite, and preparation method and use therefor10 Mar 2026US 12,569,824 B2Korea Atomic Energy Research Institute
- Stepwise chemical separation methods and systems using resin packed columns3 Mar 2026US 12,567,510 B2SHINE Technologies, LLC
- Stepwise Chemical Separation Methods and Systems Using Resin Packed Columns20 Aug 2026US 2026/0245761 A1SHINE Technologies, LLC
- Method for integrated treatment of radioactive liquid waste generated during decommissioning of nuclear power plant18 Jun 2026US 2026/0171277 A1LCGen Co., Ltd.
- Device for recovering medical radioactive isotopes7 May 2026US 2026/0124558 A1
- Method for preparing schiff base-modified ionic framework material and use thereof in advanced purification of 177 lu-containing medical wastewater23 Apr 2026US 2026/0108871 A1Southwest University of Science and Technology
- Radionuclide separating apparatus and fluid recovery method using the same19 Mar 2026US 2026/0081049 A1Korea Atomic Energy Research Institute
Most cited
By later US patents
- Method for treating mixed radioactive waste111US 5,745,861 AMolten Metal Technology, Inc. · 1998
- Supercritical fluid extraction80US 5,356,538 AIdaho Research Foundation, Inc. · 1994
- Extraction of metals using supercritical fluid and chelate forming legand71US 5,730,874 AIdaho Research Foundation, Inc. · 1998
- Zeolite bed leach septic system and method for wastewater treatment62US 6,531,063 B12003
- Methods and devices for the separation of radioactive rare earth metal isotopes from their alkaline earth metal precursors59US 5,225,173 AIdaho Research Foundation, Inc. · 1993