G01N 1/2258
In a stack or chimney
Official title: {in a stack or chimney}
G01N1/2258 (In a stack or chimney) appears on 221 US grants and 133 published applications in this corpus.
Search patents in G01N- Granted patents
- 221
- Published applications
- 133
- Assignees
- 180
- Inventors
- 498
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 6 | 0 |
| 1978 | 3 | 0 |
| 1979 | 6 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 6 | 0 |
| 1992 | 7 | 0 |
| 1993 | 5 | 0 |
| 1994 | 7 | 0 |
| 1995 | 7 | 0 |
| 1996 | 8 | 0 |
| 1997 | 6 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 7 | 3 |
| 2002 | 5 | 7 |
| 2003 | 3 | 9 |
| 2004 | 5 | 5 |
| 2005 | 5 | 6 |
| 2006 | 4 | 5 |
| 2007 | 2 | 5 |
| 2008 | 5 | 6 |
| 2009 | 7 | 8 |
| 2010 | 5 | 5 |
| 2011 | 5 | 4 |
| 2012 | 7 | 5 |
| 2013 | 2 | 10 |
| 2014 | 4 | 6 |
| 2015 | 4 | 6 |
| 2016 | 6 | 3 |
| 2017 | 5 | 5 |
| 2018 | 3 | 3 |
| 2019 | 5 | 2 |
| 2020 | 2 | 4 |
| 2021 | 3 | 4 |
| 2022 | 5 | 6 |
| 2023 | 4 | 8 |
| 2024 | 7 | 7 |
| 2025 | 2 | 1 |
| 2026 | 5 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Gas analyzer2 Jun 2026US 12,644,800 B2Shimadzu Corporation
- Gas sampling apparatus for extraction of gaseous samples12 May 2026US 12,625,040 B2Flo2R Aps
- Measurement apparatus for measuring air flowing inside pipeline5 May 2026US 12,618,753 B2Siemens Schweiz AG
- Gas analyzer3 Feb 2026US 12,540,931 B2Shimadzu Corporation
- Diluter, analysis system, and analysis method13 Jan 2026US 12,523,581 B2Horiba, Ltd.
- Exhaust gas composition characterization in combustion systems16 Oct 2025US 2025/0321003 A1Clean Connect AI, Inc.
- Autonomous real-time emissions monitor for marine exhaust emissions28 Nov 2024US 2024/0393214 A1Seaarctos Holdings, LLC
- Device to correct stack emissions based on humidity measurements17 Oct 2024US 2024/0344476 A1Honeywell International Inc.
- Sampling probe, containment, and corresponding use3 Oct 2024US 2024/0326034 A1Skan AG
- Capture method and capture station for flue gas from chemical industry park, and application thereof15 Aug 2024US 2024/0271781 A1Shihezi University
Most cited
By later US patents
- Configurable multi-point sampling method and system for representative gas composition measurements in a stratified gas flow stream82US 6,904,815 B2General Electric Company · 2005
- Sampler for analyzers79US 4,008,620 AHitachi, Ltd. · 1977
- Method and apparatus for sampling atmospheric mercury76US 3,933,431 AThe United States of America as represented by the United States Energy Research and Development Administration · 1976
- Gas sample chamber68US 5,163,332 AGaztech International Corporation · 1992
- NDIR gas analysis using spectral ratioing technique52US 5,341,214 AGaztech International Corporation · 1994