C02F 1/281
Using inorganic sorbents
Official title: {using inorganic sorbents}
C02F1/281 (Using inorganic sorbents) appears on 1,875 US grants and 2,387 published applications in this corpus.
Search patents in C02F- Granted patents
- 1,875
- Published applications
- 2,387
- Assignees
- 1,375
- Inventors
- 5,376
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 7 | 0 |
| 1978 | 6 | 0 |
| 1979 | 6 | 0 |
| 1980 | 15 | 0 |
| 1981 | 14 | 0 |
| 1982 | 7 | 0 |
| 1983 | 8 | 0 |
| 1984 | 5 | 0 |
| 1985 | 2 | 0 |
| 1986 | 9 | 0 |
| 1987 | 11 | 0 |
| 1988 | 17 | 0 |
| 1989 | 12 | 0 |
| 1990 | 7 | 0 |
| 1991 | 10 | 0 |
| 1992 | 13 | 0 |
| 1993 | 18 | 0 |
| 1994 | 9 | 0 |
| 1995 | 15 | 0 |
| 1996 | 17 | 0 |
| 1997 | 24 | 0 |
| 1998 | 14 | 0 |
| 1999 | 21 | 0 |
| 2000 | 22 | 0 |
| 2001 | 22 | 7 |
| 2002 | 29 | 41 |
| 2003 | 33 | 51 |
| 2004 | 32 | 51 |
| 2005 | 34 | 79 |
| 2006 | 27 | 66 |
| 2007 | 41 | 53 |
| 2008 | 51 | 86 |
| 2009 | 42 | 62 |
| 2010 | 42 | 87 |
| 2011 | 54 | 87 |
| 2012 | 46 | 87 |
| 2013 | 44 | 83 |
| 2014 | 53 | 128 |
| 2015 | 65 | 119 |
| 2016 | 63 | 104 |
| 2017 | 68 | 105 |
| 2018 | 75 | 116 |
| 2019 | 98 | 116 |
| 2020 | 97 | 145 |
| 2021 | 81 | 137 |
| 2022 | 94 | 108 |
| 2023 | 87 | 108 |
| 2024 | 111 | 130 |
| 2025 | 136 | 131 |
| 2026 | 53 | 100 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Silica-based nanoparticles for PFAS remediation6 Oct 2026US 12,752,323 B2Regents of the University of Minnesota
- Silicon-aluminum-iron composite material, and preparation method therefor and use thereof29 Sep 2026US 12,746,526 B2Guangdong Brunp Recycling Technology Co., Ltd.
- Composite metal oxide29 Sep 2026US 12,747,166 B2SETOLAS Holdings, Inc.
- Method for preparing lithium extraction absorbent and its application1 Sep 2026US 12,722,138 B2Harbin Institute of Technology
- Filter cartridge and filter having same25 Aug 2026US 12,714,954 B2Solventum Intellectual Properties Company
- Self-Adhering Sorbent Panels1 Oct 2026US 2026/0296927 A1Water Harvesting, Inc.
- Oxygen or hydrogen functional water production device1 Oct 2026US 2026/0296941 A1Cosan Co., Ltd.
- Composite resins for selective germanium removal from aqueous solutions24 Sep 2026US 2026/0284636 A1Advanced Isotope Technologies, LLC
- Water evaporation and mineral extraction devices17 Sep 2026US 2026/0274727 A1The Trustees of Princeton University
- Active Material For Use In Single Stage Wastewater Treatment3 Sep 2026US 2026/0257947 A1
Most cited
By later US patents
- Crystalline silica263US 4,061,724 AUnion Carbide Corporation · 1977
- Filter cartridge assemblies and methods for filtering fluids217US 6,878,283 B2Renal Solutions, Inc. · 2005
- Nanofiber filter media194US 6,872,311 B2Koslow Technologies Corporation · 2005
- Ammonia scavenger185US 4,460,555 AOrganon Teknika Corporation · 1984
- Ammonia scavenger170US 4,650,587 AAkzona Incorporated · 1987