C02F 3/345
For biological oxidation or reduction of sulfur compounds
Official title: {for biological oxidation or reduction of sulfur compounds}
C02F3/345 (For biological oxidation or reduction of sulfur compounds) appears on 178 US grants and 141 published applications in this corpus.
Search patents in C02F- Granted patents
- 178
- Published applications
- 141
- Assignees
- 148
- Inventors
- 477
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 5 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 5 | 0 |
| 1999 | 5 | 0 |
| 2000 | 9 | 0 |
| 2001 | 7 | 0 |
| 2002 | 2 | 2 |
| 2003 | 3 | 1 |
| 2004 | 0 | 4 |
| 2005 | 1 | 3 |
| 2006 | 4 | 5 |
| 2007 | 8 | 6 |
| 2008 | 3 | 6 |
| 2009 | 5 | 6 |
| 2010 | 4 | 5 |
| 2011 | 5 | 4 |
| 2012 | 0 | 3 |
| 2013 | 5 | 3 |
| 2014 | 2 | 1 |
| 2015 | 3 | 5 |
| 2016 | 2 | 11 |
| 2017 | 5 | 12 |
| 2018 | 9 | 9 |
| 2019 | 9 | 5 |
| 2020 | 8 | 10 |
| 2021 | 7 | 8 |
| 2022 | 5 | 8 |
| 2023 | 5 | 6 |
| 2024 | 2 | 10 |
| 2025 | 4 | 6 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Adsorption material and method for treating pollutants19 May 2026US 12,629,655 B2Well Resources Inc.
- Method for treating waters, sediments and/or sludges24 Feb 2026US 12,559,400 B2OASE GmbH
- System and method of generating hydrogen gas24 Feb 2026US 12,559,401 B2Rtx Bbn Technologies, Inc.
- System and method of generating electricity in a body of water14 Oct 2025US 12,441,644 B2Rtx Bbn Technologies, Inc.
- System and method of separating oxygen from a body of water30 Sep 2025US 12,428,328 B2Rtx Bbn Technologies, Inc.
- Bioremediation systems for wastewater treatment and methods for the use thereof7 May 2026US 2026/0125301 A1Cemvita Factory, Inc.
- Mineral recovery and chemical production from produced water in a gas oil separation plant12 Mar 2026US 2026/0070826 A1Saudi Arabian Oil Company
- Two-phase sulfate reduction device and treatment method for preventing sludge calcification20 Nov 2025US 2025/0353766 A1Nanjing University
- A method for purifying sulphate containing wastewater and recovering sulphur and hydrogen19 Jun 2025US 2025/0197263 A1Fortum Waste Solutions Oy
- Integrated synchronous nitrogen and sulfur removal device and wastewater treatment method15 May 2025US 2025/0154037 A1Chongqing University
Most cited
By later US patents
- Apparatus for on-site production of nitrate ions409US 7,514,058 B1The Lata Group, Inc. · 2009
- Biocatalyzed partial demineralization of acidic metal sulfate solutions46US 5,076,927 A1991
- Process for the removal and recovery of heavy metals from aqueous solutions42US 4,522,723 AKerr-McGee Corporation · 1985
- Conversion of inorganic ions to metal sulfides by microorganisms39US 4,789,478 A1988
- Process for removal of dissolved hydrogen sulfide and reduction of sewage BOD in sewer or other waste systems36US 4,911,843 ADavis Water & Waste Industries, Inc. · 1990