G01N 2021/0314
Double pass, autocollimated path
Official title: {Double pass, autocollimated path}
G01N2021/0314 (Double pass, autocollimated path) appears on 78 US grants and 73 published applications in this corpus.
Search patents in G01N- Granted patents
- 78
- Published applications
- 73
- Assignees
- 70
- Inventors
- 233
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 6 | 0 |
| 1992 | 0 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 1 | 1 |
| 2011 | 2 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 2 |
| 2014 | 2 | 4 |
| 2015 | 2 | 3 |
| 2016 | 5 | 5 |
| 2017 | 4 | 3 |
| 2018 | 4 | 3 |
| 2019 | 1 | 4 |
| 2020 | 4 | 6 |
| 2021 | 4 | 2 |
| 2022 | 4 | 13 |
| 2023 | 10 | 7 |
| 2024 | 2 | 4 |
| 2025 | 8 | 5 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Measurement system including reflector30 Dec 2025US 12,510,466 B23M Innovative Properties Company
- Concentration measurement device23 Sep 2025US 12,424,468 B2Fujikin Incorporated
- Combustion-zone chemical sensing system and associated method9 Sep 2025US 12,411,081 B2Mg Smart Ventures, LLC
- Optical alignment compensation system for a gas detection system19 Aug 2025US 12,392,714 B2Imec Vzw
- Multi-sectioned window for spectroscopic device27 May 2025US 12,313,461 B2Endress+Hauser Optical Analysis, Inc.
- Ultraviolet differential optical absorption spectroscopy (uv-doas) and open path (op) based long-distance detection device for chlorine gas, and method7 May 2026US 2026/0126376 A1China Special Equipment Inspection & Research Institute
- High-precision double-range infrared gas sensor and high-precision double-range infrared gas analysis method30 Apr 2026US 2026/0118262 A1Cubic Sensor and Instrument Co., Ltd
- Free space optical spectrometer systems and methods for their use26 Mar 2026US 2026/0085998 A1JP3 Measurement, LLC
- Water test system5 Feb 2026US 2026/0036522 A1CoralVue
- Device for measuring optical spectrum of flowing liquid3 Jul 2025US 2025/0216324 A1Nanjing Hanshu Environmental Protection Equipment Co., Ltd.
Most cited
By later US patents
- Optical fiber probe for monitoring fluid medium85US 5,581,648 A1996
- Remote gas analyzer for motor vehicle exhaust emissions surveillance77US 4,924,095 AWest Lodge Research · 1990
- Optical pH and gas concentration sensor55US 5,039,492 AMetricor, Inc. · 1991
- Apparatus for detecting deterioration of engine oil36US 5,049,742 AKyodo Oil Technical Research Co., Ltd. · 1991
- Miniaturized fabry-perot spectrometer for optical analysis33US 5,818,586 AVaisala Oy · 1998