G01N 2021/3174
Filter wheel
Official title: {Filter wheel}
G01N2021/3174 (Filter wheel) appears on 87 US grants and 77 published applications in this corpus.
Search patents in G01N- Granted patents
- 87
- Published applications
- 77
- Assignees
- 74
- Inventors
- 204
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 6 |
| 2004 | 5 | 3 |
| 2005 | 2 | 2 |
| 2006 | 4 | 4 |
| 2007 | 2 | 2 |
| 2008 | 1 | 4 |
| 2009 | 1 | 6 |
| 2010 | 2 | 3 |
| 2011 | 4 | 2 |
| 2012 | 1 | 3 |
| 2013 | 4 | 7 |
| 2014 | 5 | 2 |
| 2015 | 7 | 3 |
| 2016 | 2 | 1 |
| 2017 | 3 | 3 |
| 2018 | 2 | 0 |
| 2019 | 3 | 4 |
| 2020 | 2 | 3 |
| 2021 | 2 | 2 |
| 2022 | 3 | 4 |
| 2023 | 1 | 4 |
| 2024 | 4 | 4 |
| 2025 | 4 | 0 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Optical component for directly measuring original valence state, original form and original phase state of high-concentration liquid in real time9 Jun 2026US 12,650,374 B2Tongji University
- Method for calibrating an apparatus for measuring the absorbance of light by a substance20 Jan 2026US 12,529,651 B2Cytiva Sweden AB
- Camera-based hemoglobin detection20 May 2025US 12,306,173 B2The Johns Hopkins University
- Apparatus and method for optically characterizing a textile sample4 Mar 2025US 12,241,836 B2Uster Technologies AG
- Gas detection using differential path length measurement18 Feb 2025US 12,228,502 B2Analog Devices, Inc.
- Optical component for directly measuring original valence state, original form and original phase state of high-concentration liquid in real time14 May 2026US 2026/0133120 A1Tongji University
- Gas correlation filter wheel and gas analyzer5 Mar 2026US 2026/0063542 A1Fuji Electric Co., Ltd.
- Improved method for classification of an edible seed and a scanning device therefor26 Feb 2026US 2026/0056119 A1Surenut Pty Ltd
- Measurement of multiple gas concentrations26 Feb 2026US 2026/0056120 A1Schlumberger Technology Corporation
- Camera-based hemoglobin detection12 Dec 2024US 2024/0410875 A1The Johns Hopkins University
Most cited
By later US patents
- Multiple component gas analyzer76US 4,914,719 ACriticare Systems, Inc. · 1990
- Non-dispersive infrared gas analyzer system72US 5,060,505 ASensors, Inc. · 1991
- Multichannel spectrophotometer63US 4,477,190 AAmerican Hospital Supply Corporation · 1984
- Infrared trace element detection system55US 4,785,184 ASpectral Sciences, Inc. · 1988
- Method and apparatus for detecting a component gas in a sample48US 5,184,017 ASensors, Inc. · 1993