G01N 21/75
Systems in which material is subjected to a chemical reaction, the progress
Official title: Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated (systems in which material is burnt in a flame or plasma G01N21/72, G01N21/73)
G01N21/75 (Systems in which material is subjected to a chemical reaction, the progress) appears on 7,134 US grants and 8,849 published applications in this corpus.
Search patents in G01N- Granted patents
- 7,134
- Published applications
- 8,849
- Assignees
- 3,538
- Inventors
- 18,268
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 23 | 0 |
| 1977 | 17 | 0 |
| 1978 | 17 | 0 |
| 1979 | 8 | 0 |
| 1980 | 15 | 0 |
| 1981 | 16 | 0 |
| 1982 | 13 | 0 |
| 1983 | 15 | 0 |
| 1984 | 15 | 0 |
| 1985 | 20 | 0 |
| 1986 | 22 | 0 |
| 1987 | 35 | 0 |
| 1988 | 36 | 0 |
| 1989 | 67 | 0 |
| 1990 | 49 | 0 |
| 1991 | 52 | 0 |
| 1992 | 96 | 0 |
| 1993 | 88 | 0 |
| 1994 | 90 | 0 |
| 1995 | 83 | 0 |
| 1996 | 85 | 0 |
| 1997 | 101 | 0 |
| 1998 | 90 | 0 |
| 1999 | 73 | 0 |
| 2000 | 81 | 0 |
| 2001 | 95 | 36 |
| 2002 | 86 | 123 |
| 2003 | 106 | 169 |
| 2004 | 90 | 171 |
| 2005 | 82 | 190 |
| 2006 | 97 | 224 |
| 2007 | 128 | 216 |
| 2008 | 120 | 279 |
| 2009 | 122 | 280 |
| 2010 | 182 | 316 |
| 2011 | 193 | 327 |
| 2012 | 207 | 340 |
| 2013 | 231 | 366 |
| 2014 | 270 | 395 |
| 2015 | 304 | 404 |
| 2016 | 290 | 450 |
| 2017 | 339 | 432 |
| 2018 | 358 | 447 |
| 2019 | 362 | 480 |
| 2020 | 352 | 570 |
| 2021 | 353 | 587 |
| 2022 | 385 | 509 |
| 2023 | 369 | 466 |
| 2024 | 301 | 399 |
| 2025 | 293 | 385 |
| 2026 | 212 | 288 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01N 21/77By observing the effect on a chemical indicator5,447
- G01N 21/76Chemiluminescence1,439
- G01N 2021/757Using immobilised reagentsIndexing code90
- G01N 2021/752Devices comprising reaction zonesIndexing code68
- G01N 2021/755Comparing readings with/without reagents, or before/after reactionIndexing code37
- G01N 2021/758Using reversible reactionIndexing code20
- G01N 2021/754Reagent flow and intermittent injection of sample or vice versaIndexing code17
- G01N 2021/751Comparing reactive/non reactive substancesIndexing code10
Recent patents
- Occult blood detection film, and preparation method therefor and use thereof and occult blood detection kit6 Oct 2026US 12,754,190 B2Ankon Medical Technologies (Shanghai) Co., LTD.
- Electrically-driven organic color-center-based single-photon sources and sensors6 Oct 2026US 12,757,571 B2University of Maryland, College Park
- Microfluidic detection strip chip and preparation and method thereof29 Sep 2026US 12,746,543 B2Xiamen Brana Design Co., Ltd.
- Plasmonic hydrogen detection29 Sep 2026US 12,748,048 B2King's College London
- Mitigation of free chlorine interference for ozone detection using an indigo-based indicator29 Sep 2026US 12,748,090 B2Hach Company
- Cartridge providing real-time colorimetric detection and/or turbidimetric detection of microorganisms via image capture on a mobile device8 Oct 2026US 2026/0309632 A1Seethru Diagnostics, LLC
- Methods and kits for rapid, colorimetric beryllium detection8 Oct 2026US 2026/0309633 A1Consolidated Nuclear Security, LLC
- Opioid Detection Wipes8 Oct 2026US 2026/0309634 A1Rockline Industries, Inc.
- Measurement apparatus and analysis method1 Oct 2026US 2026/0298829 A1
- Sample measurement system and sample measurement method1 Oct 2026US 2026/0298831 A1Sysmex Corporation
Most cited
By later US patents
- Capillary flow device951US 4,963,498 ABiotrack, Inc. · 1990
- Optical sensor of plasma constituents945US 4,344,438 AThe United States of America as represented by the Department of Health, Education and Welfare · 1982
- Optical-based sensing devices745US 6,330,464 B1Sensors for Medicine and Science, Inc. · 2001
- Fiber-optic physiological probes732US 4,925,268 AAbbott Laboratories · 1990
- Fiber-optic probe for the measurement of fluid parameters729US 5,408,999 AOptex Biomedical, Inc. · 1995