C02F 2101/20
Heavy metals or heavy metal compounds
C02F2101/20 (Heavy metals or heavy metal compounds) appears on 2,692 US grants and 3,258 published applications in this corpus.
Search patents in C02F- Granted patents
- 2,692
- Published applications
- 3,258
- Assignees
- 1,963
- Inventors
- 7,348
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 19 | 0 |
| 1977 | 25 | 0 |
| 1978 | 18 | 0 |
| 1979 | 15 | 0 |
| 1980 | 26 | 0 |
| 1981 | 17 | 0 |
| 1982 | 16 | 0 |
| 1983 | 10 | 0 |
| 1984 | 12 | 0 |
| 1985 | 5 | 0 |
| 1986 | 15 | 0 |
| 1987 | 14 | 0 |
| 1988 | 21 | 0 |
| 1989 | 17 | 0 |
| 1990 | 16 | 0 |
| 1991 | 29 | 0 |
| 1992 | 23 | 0 |
| 1993 | 32 | 0 |
| 1994 | 41 | 0 |
| 1995 | 24 | 0 |
| 1996 | 30 | 0 |
| 1997 | 20 | 0 |
| 1998 | 23 | 0 |
| 1999 | 41 | 0 |
| 2000 | 38 | 0 |
| 2001 | 46 | 14 |
| 2002 | 49 | 57 |
| 2003 | 40 | 60 |
| 2004 | 43 | 73 |
| 2005 | 48 | 88 |
| 2006 | 41 | 82 |
| 2007 | 58 | 88 |
| 2008 | 55 | 106 |
| 2009 | 43 | 93 |
| 2010 | 65 | 115 |
| 2011 | 67 | 113 |
| 2012 | 66 | 115 |
| 2013 | 70 | 109 |
| 2014 | 79 | 161 |
| 2015 | 69 | 162 |
| 2016 | 97 | 155 |
| 2017 | 94 | 159 |
| 2018 | 100 | 156 |
| 2019 | 128 | 180 |
| 2020 | 122 | 172 |
| 2021 | 138 | 185 |
| 2022 | 141 | 193 |
| 2023 | 121 | 165 |
| 2024 | 126 | 150 |
| 2025 | 165 | 185 |
| 2026 | 74 | 122 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Silicon-aluminum-iron composite material, and preparation method therefor and use thereof29 Sep 2026US 12,746,526 B2Guangdong Brunp Recycling Technology Co., Ltd.
- Separating ions in water using plastic ice VII29 Sep 2026US 12,747,165 B2International Business Machines Corporation
- Apparatus and methods for methyl mercury detection and capture22 Sep 2026US 12,741,891 B2The Regents of the University of California
- Treating produced water for beneficial reuse8 Sep 2026US 12,729,139 B2Renovo Resources LLC
- Enhanced foam fractionation of oil phase from aqueous/oil mixed phase via increased viscoelasticity8 Sep 2026US 12,729,140 B2Ecolab USA Inc.
- Derivatized polyamine polymers for use in metal scavenging applications8 Oct 2026US 2026/0308027 A1Bl Technologies, Inc.
- Method for metal ion removal from metal-containing solution using fluidized bed homogeneous crystallization24 Sep 2026US 2026/0285717 A1National Chunghsing University
- Integrated Method and Apparatus for Treatment of Produced Water24 Sep 2026US 2026/0285725 A1Tetra Technologies, Inc.
- Integrated Method and Apparatus for Treatment of Produced Water24 Sep 2026US 2026/0285726 A1Tetra Technologies, Inc.
- Filtering System for a Storm Water Catch Basin17 Sep 2026US 2026/0274709 A1Trash Guard Incorporated
Most cited
By later US patents
- Flue gas control system of coal combustion boiler and operating method thereof122US 8,071,060 B2Mitsubishi Heavy Industries, Ltd. · 2011
- Membrane based fluid treatment systems110US 7,186,344 B2Water Visions International, Inc. · 2007
- Methods and apparatus for the application of combined fields to disinfect fluids89US 5,997,812 ACoolant Treatment Systems, L.L.C. · 1999
- Method and system for purifying liquid88US 3,985,648 AAlmag Pollution Control Corporation · 1976
- Microbial culture liquors containing microorganisms differing in characteristics and living in symbiosis and metabolites thereof, carriers and adsorbents containing the active components of the culture liquors and utilization of the same88US 6,649,397 B1Orient Green Co., Ltd. · 2003