G01N 31/227
For nitrates or nitrites
Official title: {for nitrates or nitrites}
G01N31/227 (For nitrates or nitrites) appears on 38 US grants and 52 published applications in this corpus.
Search patents in G01N- Granted patents
- 38
- Published applications
- 52
- Assignees
- 43
- Inventors
- 128
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 3 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 2 |
| 2014 | 2 | 6 |
| 2015 | 3 | 4 |
| 2016 | 1 | 3 |
| 2017 | 4 | 4 |
| 2018 | 4 | 7 |
| 2019 | 4 | 5 |
| 2020 | 4 | 3 |
| 2021 | 2 | 1 |
| 2022 | 2 | 4 |
| 2023 | 2 | 3 |
| 2024 | 1 | 2 |
| 2025 | 1 | 1 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- High and low frequency soil and plant analysis systems with integrated measurements23 Jun 2026US 12,660,733 B2Precision Planting LLC
- Detection of nitrates and their decomposition products by means of fluorescence measurement2 Jun 2026US 12,644,871 B2Bunderspublik Deutschland, vetreten durch den Bundesminister für Wirtschaft und Energie
- Analytical process for detecting peroxide-, nitrate-, nitramine-, and nitrotoluene-based explosives7 Oct 2025US 12,436,135 B2Christian-Albrechts-Universität zu Kiel
- Devices, systems, and methods for detecting targeted compounds24 Dec 2024US 12,174,164 B2Purdue Research Foundation
- Surface functionalization of cellulose and other substrates7 Feb 2023US 11,572,417 B2University of Rhode Island Board of Trustees
- High and low frequency soil and plant analysis systems with integrated measurements17 Sep 2026US 2026/0271821 A1Precision Planting LLC
- Analytical process for detecting peroxide-, halogen oxoanion-, and nitrate-based explosives29 Jan 2026US 2026/0029389 A1Christian-Albrechts-Universität zu Kiel
- Analyte sensing24 Apr 2025US 2025/0130213 A1Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung
- Selective monitoring of base chemicals11 Jul 2024US 2024/0230608 A9ECI Technology, Inc.
- Selective monitoring of base chemicals25 Apr 2024US 2024/0133852 A1ECI Technology, Inc.
Most cited
By later US patents
- Method and apparatus for detecting nitrite ions in fluids28US 4,434,235 ABen-Gurion University of the Negev Research and Development Authority · 1984
- Selective ion chemistry for nitrate detection13US 9,726,655 B2Morpho Detection, Inc. · 2017
- Systems and methods for detecting nitric oxide11US 10,078,054 B2Aobiome LLC · 2018
- Method and reagents for the detection, estimation and quantitative determination of nitrate ions9US 4,003,706 ABen-Gurion University of the Negev Research and Development Authority · 1977
- Method, reagent and kit for the determination of nitrate ions5US 4,690,902 AMerck Patent GmbH · 1987