C02F 2101/22
Chromium or chromium compounds
Official title: Chromium or chromium compounds, e.g. chromates
C02F2101/22 (Chromium or chromium compounds) appears on 480 US grants and 576 published applications in this corpus.
Search patents in C02F- Granted patents
- 480
- Published applications
- 576
- Assignees
- 425
- Inventors
- 1,472
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 10 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 7 | 0 |
| 1981 | 4 | 0 |
| 1982 | 8 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 7 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 12 | 0 |
| 1995 | 7 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 5 |
| 2002 | 13 | 15 |
| 2003 | 6 | 15 |
| 2004 | 12 | 18 |
| 2005 | 15 | 20 |
| 2006 | 9 | 12 |
| 2007 | 11 | 20 |
| 2008 | 13 | 14 |
| 2009 | 11 | 12 |
| 2010 | 11 | 16 |
| 2011 | 5 | 18 |
| 2012 | 6 | 19 |
| 2013 | 10 | 14 |
| 2014 | 15 | 24 |
| 2015 | 7 | 28 |
| 2016 | 13 | 28 |
| 2017 | 13 | 27 |
| 2018 | 20 | 32 |
| 2019 | 29 | 30 |
| 2020 | 20 | 38 |
| 2021 | 22 | 32 |
| 2022 | 25 | 34 |
| 2023 | 22 | 30 |
| 2024 | 27 | 29 |
| 2025 | 27 | 27 |
| 2026 | 16 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Azo-linked organic polymers for carbon dioxide capture and metal ion removal14 Jul 2026US 12,678,769 B2King Fahd University of Petroleum and Minerals
- Membrane comprising biopolymers and carbon nanomaterials for removing heavy metals in polluted waters2 Jun 2026US 12,643,088 B2Universidad TéCnica Federico Santa MaríA
- Composite material and method for removing pollutant from polluted water19 May 2026US 12,629,653 B2Beijing University of Chemical Technology
- Production of silicate solutions and their uses19 May 2026US 12,630,433 B2Total Alchemy Solutions, LLC
- Resource-oriented utilization method for high-salt salt mud containing sodium chloride and sodium sulfate19 May 2026US 12,630,453 B2Dongjiang Enviromental Company Limited
- Composite material for remedying soils with contamination of heavy metals and method therefor20 Aug 2026US 2026/0241363 A1Beijing University of Chemical Technology
- Porous body, adsorbent including the porous body, and method of removing metal and/or metal ion with the adsorbent20 Aug 2026US 2026/0241370 A1Mitsui Mining & Smelting Co., Ltd.
- Processing Of Phosphate Solutions6 Aug 2026US 2026/0225888 A1Easymining Sweden AB
- Coagulant compositions and methods of use6 Aug 2026US 2026/0225932 A1Locus Solutions Ipco, LLC
- Treatment and recycling of wastewater from trivalent chromium plating processes30 Jul 2026US 2026/0217572 A1MacDermid Enthone Inc.
Most cited
By later US patents
- Method and system for purifying liquid88US 3,985,648 AAlmag Pollution Control Corporation · 1976
- Filter and sorbent for removal of contaminants from a fluid83US 7,378,372 B2Layne Christensen Company · 2008
- Phosphoric acid/lime hazardous waste detoxification treatment process60US 4,671,882 ADeere & Company · 1987
- Method for treating polluted material60US 5,053,142 AForskningscenter Riso · 1991
- System for removing toxic organics and metals from manufacturing wastewater55US 4,724,084 AThe Boeing Company · 1988