G01N 31/00
Investigating or analysing non-biological materials by the use of the chemical methods
Official title: Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
G01N31/00 (Investigating or analysing non-biological materials by the use of the chemical methods) appears on 3,698 US grants and 3,339 published applications in this corpus.
Search patents in G01N- Granted patents
- 3,698
- Published applications
- 3,339
- Assignees
- 2,053
- Inventors
- 8,558
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 76 | 0 |
| 1977 | 68 | 0 |
| 1978 | 55 | 0 |
| 1979 | 23 | 0 |
| 1980 | 46 | 0 |
| 1981 | 74 | 0 |
| 1982 | 48 | 0 |
| 1983 | 27 | 0 |
| 1984 | 33 | 0 |
| 1985 | 33 | 0 |
| 1986 | 38 | 0 |
| 1987 | 50 | 0 |
| 1988 | 57 | 0 |
| 1989 | 59 | 0 |
| 1990 | 47 | 0 |
| 1991 | 72 | 0 |
| 1992 | 68 | 0 |
| 1993 | 71 | 0 |
| 1994 | 78 | 0 |
| 1995 | 63 | 0 |
| 1996 | 57 | 0 |
| 1997 | 42 | 0 |
| 1998 | 65 | 0 |
| 1999 | 65 | 0 |
| 2000 | 62 | 0 |
| 2001 | 55 | 20 |
| 2002 | 73 | 85 |
| 2003 | 75 | 123 |
| 2004 | 76 | 118 |
| 2005 | 43 | 109 |
| 2006 | 52 | 100 |
| 2007 | 47 | 117 |
| 2008 | 49 | 124 |
| 2009 | 61 | 100 |
| 2010 | 80 | 106 |
| 2011 | 74 | 129 |
| 2012 | 91 | 105 |
| 2013 | 90 | 120 |
| 2014 | 104 | 138 |
| 2015 | 103 | 141 |
| 2016 | 113 | 177 |
| 2017 | 109 | 132 |
| 2018 | 130 | 174 |
| 2019 | 120 | 176 |
| 2020 | 129 | 194 |
| 2021 | 125 | 201 |
| 2022 | 145 | 142 |
| 2023 | 119 | 165 |
| 2024 | 76 | 130 |
| 2025 | 104 | 131 |
| 2026 | 78 | 82 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01N 31/22Investigating or analysing non-biological materials by the use of the chemical methods2,558
- G01N 31/12Investigating or analysing non-biological materials by the use of the chemical methods328
- G01N 31/16Investigating or analysing non-biological materials by the use of the chemical methods257
- G01N 31/005Investigating the presence of an element by oxidation218
- G01N 31/10Investigating or analysing non-biological materials by the use of the chemical methods217
- G01N 31/02Investigating or analysing non-biological materials by the use of the chemical methods36
- G01N 31/002Determining nitrogen by transformation into ammonia13
- G01N 31/20Investigating or analysing non-biological materials by the use of the chemical methods13
Recent patents
- Methods of detecting perfluoroalkyl or polyfluoroalkyl substances6 Oct 2026US 12,754,174 B2Shaw Industries Group, Inc.
- Mitigation of free chlorine interference for ozone detection using an indigo-based indicator29 Sep 2026US 12,748,090 B2Hach Company
- Reducing member, analysis device, and analysis method22 Sep 2026US 12,742,757 B2Bl Tec K.K.
- Hydrogel coating composition for chemical sensor and chemical sensor fabricated using same1 Sep 2026US 12,723,159 B2Kookmin University Industry Academy Cooperation Foundation
- Chromium VI test1 Sep 2026US 12,723,987 B2Matinspired B.V.
- Meltable color changeable indicators with organic polymer cores and methods of making such meltable indicators and composites thereof1 Oct 2026US 2026/0298832 A1Thermographic Measurements Ltd
- Chloride measurement with silver, 2,4,6-tripyridyl-s-triazine and iron (ii) titration1 Oct 2026US 2026/0298895 A1Hach Company
- Systems and methods of ph modeling and control1 Oct 2026US 2026/0298896 A1Regeneron Pharmaceuticals, Inc.
- Demulsifier screening and characterization using modified karl fischer reagent1 Oct 2026US 2026/0298897 A1Saudi Arabian Oil Company
- Contrast component coating for sensor analysis24 Sep 2026US 2026/0286842 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Process and apparatus for measuring gaseous fixed nitrogen species509US 4,333,735 AExxon Research & Engineering Co. · 1982
- Transdermal dosimeter and method of use488US 4,595,011 A1986
- Element, structure and method for the analysis or transport of liquids417US 4,258,001 AEastman Kodak Company · 1981
- Color changing device for monitoring shelf-life of perishable products367US 5,053,339 AJ P Labs Inc. · 1991
- Sensor device containing mesoporous crystalline material348US 5,364,797 AMobil Oil Corporation · 1994