C02F 3/286
Including two or more steps
Official title: {including two or more steps}
C02F3/286 (Including two or more steps) appears on 323 US grants and 322 published applications in this corpus.
Search patents in C02F- Granted patents
- 323
- Published applications
- 322
- Assignees
- 252
- Inventors
- 761
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 6 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 12 | 3 |
| 2002 | 18 | 8 |
| 2003 | 14 | 19 |
| 2004 | 11 | 21 |
| 2005 | 13 | 16 |
| 2006 | 10 | 16 |
| 2007 | 11 | 17 |
| 2008 | 10 | 11 |
| 2009 | 8 | 18 |
| 2010 | 13 | 20 |
| 2011 | 9 | 8 |
| 2012 | 9 | 18 |
| 2013 | 16 | 23 |
| 2014 | 14 | 21 |
| 2015 | 8 | 13 |
| 2016 | 8 | 7 |
| 2017 | 10 | 6 |
| 2018 | 5 | 15 |
| 2019 | 9 | 11 |
| 2020 | 8 | 11 |
| 2021 | 6 | 8 |
| 2022 | 10 | 10 |
| 2023 | 5 | 7 |
| 2024 | 4 | 6 |
| 2025 | 8 | 7 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- System and method for treatment of animal manure containing wastewater12 Aug 2025US 12,384,707 B2Evoqua Water Technologies Canada Ltd.
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- Two-phase sulfate reduction device and treatment method for preventing sludge calcification20 Nov 2025US 2025/0353766 A1Nanjing University
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Most cited
By later US patents
- Method for processing lignocellulosic material150US 6,555,350 B2Forskningscenter Riso · 2003
- Method and apparatus for treating stormwater runoff122US 6,277,274 B12001
- Two phase anaerobic digestion107US 4,022,665 AInstitute of Gas Technology · 1977
- Utilities container82US 6,393,775 B12002
- Gas production by accelerated in situ bioleaching of landfills80US 4,323,367 AInstitute of Gas Technology · 1982