G01J 3/42
Absorption spectrometry
Official title: Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry (beam switching arrangements G01J3/08)
G01J3/42 (Absorption spectrometry) appears on 2,607 US grants and 2,704 published applications in this corpus.
Search patents in G01J- Granted patents
- 2,607
- Published applications
- 2,704
- Assignees
- 1,374
- Inventors
- 5,224
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 7 | 0 |
| 1978 | 8 | 0 |
| 1979 | 10 | 0 |
| 1980 | 2 | 0 |
| 1981 | 13 | 0 |
| 1982 | 6 | 0 |
| 1983 | 4 | 0 |
| 1984 | 12 | 0 |
| 1985 | 9 | 0 |
| 1986 | 9 | 0 |
| 1987 | 12 | 0 |
| 1988 | 16 | 0 |
| 1989 | 15 | 0 |
| 1990 | 12 | 0 |
| 1991 | 15 | 0 |
| 1992 | 10 | 0 |
| 1993 | 15 | 0 |
| 1994 | 11 | 0 |
| 1995 | 5 | 0 |
| 1996 | 10 | 0 |
| 1997 | 10 | 0 |
| 1998 | 24 | 0 |
| 1999 | 30 | 0 |
| 2000 | 21 | 0 |
| 2001 | 13 | 7 |
| 2002 | 20 | 21 |
| 2003 | 28 | 36 |
| 2004 | 28 | 40 |
| 2005 | 29 | 54 |
| 2006 | 44 | 64 |
| 2007 | 49 | 79 |
| 2008 | 61 | 72 |
| 2009 | 56 | 65 |
| 2010 | 54 | 81 |
| 2011 | 67 | 76 |
| 2012 | 56 | 92 |
| 2013 | 76 | 103 |
| 2014 | 91 | 114 |
| 2015 | 109 | 138 |
| 2016 | 118 | 135 |
| 2017 | 140 | 156 |
| 2018 | 139 | 172 |
| 2019 | 179 | 212 |
| 2020 | 178 | 200 |
| 2021 | 178 | 196 |
| 2022 | 151 | 149 |
| 2023 | 140 | 142 |
| 2024 | 118 | 119 |
| 2025 | 114 | 110 |
| 2026 | 78 | 71 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Time-of-flight measurement on user with cameras and position sensor6 Oct 2026US 12,751,628 B2Omni Medsci, Inc.
- Photometric process measurement arrangement and a photometric measurement method29 Sep 2026US 12,747,985 B2Hach Lange GmbH
- Pulsed illumination in a hyperspectral, fluorescence and laser mapping imaging system29 Sep 2026US 12,748,209 B2Cilag GmbH International
- Optical module, electronic device, and driving method29 Sep 2026US 12,748,300 B2Seiko Epson Corporation
- Layer thickness determination by four-wave-mixing spectroscopy22 Sep 2026US 12,742,635 B2Monstr Sense Technologies, LLC
- Temperature-robust calibration path optical design24 Sep 2026US 2026/0287423 A1Trinamix GmbH
- Interference measurement device and interference measurement method10 Sep 2026US 2026/0266661 A1Hamamatsu Photonics K.K.
- Spectrophotometer and spectrometric data processing method10 Sep 2026US 2026/0266715 A1Shimadzu Corporation
- Entangled photon source that can replace a pulsed laser in non-ablative multiphoton and nonlinear processes10 Sep 2026US 2026/0267198 A1California Institute of Technology
- Apparatuses and methods for anomalous gas concentration detection3 Sep 2026US 2026/0259099 A1Bridger Photonics, Inc.
Most cited
By later US patents
- Method and device for measuring concentration levels of blood constituents non-invasively406US 5,361,758 ACME Telemetrix Inc. · 1994
- Non-invasive determination of glucose concentration in body of patients317US 5,070,874 ABiocontrol Technology, Inc. · 1991
- Tissue chromophore measurement system295US 5,879,294 AHutchinson Technology Incorporated · 1999
- Method and system for transmitting terahertz pulses257US 7,531,803 B2William Marsh Rice University · 2009
- Surgical imaging systems249US 10,292,771 B2Synaptive Medical (Barbados) Inc. · 2019