G01N 33/18
Water
G01N33/18 (Water) appears on 2,964 US grants and 3,211 published applications in this corpus.
Search patents in G01N- Granted patents
- 2,964
- Published applications
- 3,211
- Assignees
- 1,867
- Inventors
- 8,370
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 28 | 0 |
| 1977 | 17 | 0 |
| 1978 | 27 | 0 |
| 1979 | 13 | 0 |
| 1980 | 16 | 0 |
| 1981 | 17 | 0 |
| 1982 | 19 | 0 |
| 1983 | 12 | 0 |
| 1984 | 12 | 0 |
| 1985 | 14 | 0 |
| 1986 | 17 | 0 |
| 1987 | 17 | 0 |
| 1988 | 22 | 0 |
| 1989 | 23 | 0 |
| 1990 | 23 | 0 |
| 1991 | 24 | 0 |
| 1992 | 44 | 0 |
| 1993 | 39 | 0 |
| 1994 | 41 | 0 |
| 1995 | 55 | 0 |
| 1996 | 54 | 0 |
| 1997 | 37 | 0 |
| 1998 | 70 | 0 |
| 1999 | 50 | 0 |
| 2000 | 37 | 0 |
| 2001 | 35 | 14 |
| 2002 | 56 | 35 |
| 2003 | 36 | 43 |
| 2004 | 33 | 50 |
| 2005 | 33 | 49 |
| 2006 | 25 | 38 |
| 2007 | 20 | 44 |
| 2008 | 33 | 64 |
| 2009 | 17 | 55 |
| 2010 | 37 | 65 |
| 2011 | 45 | 68 |
| 2012 | 53 | 95 |
| 2013 | 49 | 111 |
| 2014 | 69 | 114 |
| 2015 | 92 | 179 |
| 2016 | 86 | 165 |
| 2017 | 132 | 178 |
| 2018 | 131 | 183 |
| 2019 | 165 | 198 |
| 2020 | 142 | 217 |
| 2021 | 178 | 225 |
| 2022 | 168 | 217 |
| 2023 | 167 | 211 |
| 2024 | 154 | 223 |
| 2025 | 170 | 198 |
| 2026 | 110 | 172 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01N 33/1826Organic contamination in water833
- G01N 33/1886Using probes287
- G01N 33/182Specific anions in water277
- G01N 33/1813Specific cations in water267
- G01N 33/1806Biological oxygen demand [bod] or chemical oxygen demand [cod]149
- G01N 33/1893Using flow cells148
- G01N 33/186Using one or more living organisms137
- G01N 33/1853Hardness of water64
All 10 subgroupsShow fewer
Recent patents
- Bubble detection and characterization via Lidar6 Oct 2026US 12,754,317 B2The Government of the United States of America, as represented by the Secretary of the Navy
- Systems and methods for identifying toxic elements in water6 Oct 2026US 12,755,130 B2True Elements, Inc.
- Integrated autonomous oil-slick sampler and storage preservation device29 Sep 2026US 12,748,019 B2ExxonMobil Technology and Engineering Company
- Flow regime classification, water liquid ratio estimation, and salinity estimation systems and methods29 Sep 2026US 12,748,093 B2OneSubsea IP UK Limited
- Device and method for real-time monitoring of water consumption of plants in saline-alkali land29 Sep 2026US 12,748,094 B2Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences
- Electrochemical method and sensor for pfas detection8 Oct 2026US 2026/0309668 A1B. G. Negev Technologies and Applications Ltd., At Ben-Gurion University
- Temperature-specific performance deviation correction apparatus and correction method for photosensor detecting nephelometric turbidity units1 Oct 2026US 2026/0297831 A1LG Electronics Inc.
- Methods and systems for determining non-triazole corrosion inhibitor concentration in industrial water systems1 Oct 2026US 2026/0298825 A1Chemtreat, Inc.
- Systems and methods for real-time translation of aquatic sensor measurements to probable causes via combination of cause-and-effect queries and language model based semantic similarity1 Oct 2026US 2026/0298904 A1
- Method of using turbidity measurements to detect wash additives in a washing machine appliance24 Sep 2026US 2026/0286591 A1Haier US Appliance Solutions, Inc.
Most cited
By later US patents
- Fluorescence quenching with immunological pairs in immunoassays1,144US 3,996,345 ASyva Company · 1976
- Method for validation of calibration standards in an automatic chemical analyzer239US 5,204,264 AE. I. Du Pont de Nemours and Company · 1993
- Method for monitoring an aqueous flow using selective film237US 6,232,783 B12001
- Monitoring, diagnostic, and reporting system and process220US 6,356,205 B1General Electric Company · 2002
- Method and apparatus for remotely monitoring and controlling a pool or spa164US 7,292,898 B2Balboa Instruments, Inc. · 2007