C02F 2209/08
Chemical oxygen demand [cod]
Official title: Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
C02F2209/08 (Chemical oxygen demand [cod]) appears on 292 US grants and 429 published applications in this corpus.
Search patents in C02F- Granted patents
- 292
- Published applications
- 429
- Assignees
- 308
- Inventors
- 1,167
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 2 | 5 |
| 2004 | 3 | 8 |
| 2005 | 5 | 2 |
| 2006 | 5 | 7 |
| 2007 | 3 | 4 |
| 2008 | 3 | 10 |
| 2009 | 6 | 9 |
| 2010 | 6 | 13 |
| 2011 | 5 | 12 |
| 2012 | 5 | 9 |
| 2013 | 7 | 18 |
| 2014 | 12 | 27 |
| 2015 | 11 | 21 |
| 2016 | 11 | 28 |
| 2017 | 15 | 26 |
| 2018 | 18 | 22 |
| 2019 | 23 | 17 |
| 2020 | 20 | 23 |
| 2021 | 21 | 36 |
| 2022 | 20 | 38 |
| 2023 | 14 | 38 |
| 2024 | 22 | 21 |
| 2025 | 24 | 26 |
| 2026 | 11 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for treating wastewater15 Sep 2026US 12,735,337 B2Mitsubishi Chemical Corporation
- Measuring and controlling organic matter in waste water stream18 Aug 2026US 12,709,561 B2Kemira Oyj
- Method and system for the efficient and sustainable electrochemical treatment of wastewater14 Jul 2026US 12,679,752 B2Axine Water Technologies Inc.
- Method for removing ammoniacal nitrogen from hypersaline effluents through a consortium containing high-salinity-resistant heterotrophic nitrifying and aerobic denitrifying microorganisms12 May 2026US 12,623,941 B2Petroleo Brasileiro S.A. - Petrobras
- Micro-polluted water body treatment method based on aquatic forest system construction5 May 2026US 12,617,703 B2Shanghai Aquatic Technology Co., Ltd.
- Two-sludge water reuse process8 Oct 2026US 2026/0308030 A1
- Methods and systems for treating aqueous effluent27 Aug 2026US 2026/0250170 A1Gradiant Corporation
- Fermentation device for recovering carboxylic acids while reducing greenhouse gas emissions30 Jul 2026US 2026/0218106 A1Shanghai Municipal Engineering Design Institute (Group) Co., Ltd.
- Applying chemical oxygen demand and heating value diagnostics to enhance performance of a scwo process16 Jul 2026US 2026/0200782 A1374Water Inc.
- Autonomous chemical dosing system and methods of use thereof16 Apr 2026US 2026/0103401 A1Evoqua Water Technologies LLC
Most cited
By later US patents
- Biological treatment of materials92US 5,846,424 AKhudenko Engineering, Inc. · 1998
- In-sewer treatment of wastewater and sludges81US 6,015,496 A2000
- Treatment of wastewater and sludges77US 5,616,241 A1997
- Sensor device and methods for using same68US 6,958,693 B2Sandia Corporation · 2005
- Counterflow microbiological processes67US 5,514,278 A1996