G01N 21/35
Using infrared light
Official title: using infrared light (G01N21/39 takes precedence)
G01N21/35 (Using infrared light) appears on 7,566 US grants and 8,314 published applications in this corpus.
Search patents in G01N- Granted patents
- 7,566
- Published applications
- 8,314
- Assignees
- 3,640
- Inventors
- 16,414
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 23 | 0 |
| 1977 | 14 | 0 |
| 1978 | 9 | 0 |
| 1979 | 12 | 0 |
| 1980 | 18 | 0 |
| 1981 | 16 | 0 |
| 1982 | 11 | 0 |
| 1983 | 14 | 0 |
| 1984 | 20 | 0 |
| 1985 | 30 | 0 |
| 1986 | 30 | 0 |
| 1987 | 42 | 0 |
| 1988 | 41 | 0 |
| 1989 | 61 | 0 |
| 1990 | 40 | 0 |
| 1991 | 63 | 0 |
| 1992 | 58 | 0 |
| 1993 | 70 | 0 |
| 1994 | 69 | 0 |
| 1995 | 82 | 0 |
| 1996 | 58 | 0 |
| 1997 | 57 | 0 |
| 1998 | 99 | 0 |
| 1999 | 80 | 0 |
| 2000 | 81 | 0 |
| 2001 | 79 | 28 |
| 2002 | 99 | 116 |
| 2003 | 132 | 182 |
| 2004 | 112 | 211 |
| 2005 | 122 | 196 |
| 2006 | 152 | 243 |
| 2007 | 177 | 227 |
| 2008 | 149 | 248 |
| 2009 | 158 | 226 |
| 2010 | 191 | 278 |
| 2011 | 164 | 261 |
| 2012 | 204 | 280 |
| 2013 | 223 | 294 |
| 2014 | 212 | 302 |
| 2015 | 283 | 366 |
| 2016 | 309 | 374 |
| 2017 | 319 | 398 |
| 2018 | 353 | 453 |
| 2019 | 423 | 503 |
| 2020 | 397 | 510 |
| 2021 | 391 | 477 |
| 2022 | 376 | 476 |
| 2023 | 385 | 494 |
| 2024 | 405 | 467 |
| 2025 | 417 | 393 |
| 2026 | 236 | 311 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01N 21/3504For analysing gases2,725
- G01N 21/359Using near infrared light1,894
- G01N 21/3563For analysing solids1,556
- G01N 21/3581Using far infrared light1,093
- G01N 21/3577For analysing liquids1,027
- G01N 2021/3595Using ftirIndexing code878
- G01N 21/3554For determining moisture content369
- G01N 21/37Using pneumatic detection95
Recent patents
- Time-of-flight measurement on user with cameras and position sensor6 Oct 2026US 12,751,628 B2Omni Medsci, Inc.
- Optical sensor and system6 Oct 2026US 12,754,132 B2The University of Sydney
- Composite structure detecting method and system6 Oct 2026US 12,754,142 B2Advanced ACEBIOTEK CO., LTD.
- Analysis apparatus and analysis method6 Oct 2026US 12,755,816 B2NGK Insulators, Ltd.
- Analysis device and analysis method29 Sep 2026US 12,748,043 B2Horiba, Ltd.
- Sample probe8 Oct 2026US 2026/0309590 A1Teknologian tutkimuskeskus VTT Oy
- Nanosecond-scale photothermal dynamic imaging8 Oct 2026US 2026/0309619 A1Trustees of Boston University
- Real-time inline milk analysis system and method8 Oct 2026US 2026/0309622 A1
- Systems and methods for calibrating emissions monitoring equipment1 Oct 2026US 2026/0298814 A1Cemtek Environmental, Inc.
- Hyperspectral imaging analytical method for determining tobacco components and levels thereof1 Oct 2026US 2026/0298815 A1British American Tobacco (Investments) Limited
Most cited
By later US patents
- Method and apparatus using alternative site glucose determinations to calibrate and maintain noninvasive and implantable analyzers1,598US 6,998,247 B2Sensys Medical, Inc. · 2006
- Implantable sensor and system for in vivo measurement and control of fluid constituent levels1,362US 6,049,727 AAnimas Corporation · 2000
- Methods for differential image quality enhancement for a multiple detector system, systems and use thereof1,019US 9,471,969 B2ExxonMobil Upstream Research Company · 2016
- Multi-wavelength physiological monitor1,017US 7,343,186 B2Masimo Laboratories, Inc. · 2008
- Compact apparatus for noninvasive measurement of glucose through near-infrared spectroscopy946US 7,133,710 B2Sensys Medical, Inc. · 2006