G01N 21/276
With alternation of sample and standard in optical path
Official title: {with alternation of sample and standard in optical path}
G01N21/276 (With alternation of sample and standard in optical path) appears on 255 US grants and 253 published applications in this corpus.
Search patents in G01N- Granted patents
- 255
- Published applications
- 253
- Assignees
- 228
- Inventors
- 595
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 6 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 4 | 4 |
| 2003 | 5 | 9 |
| 2004 | 7 | 6 |
| 2005 | 5 | 14 |
| 2006 | 6 | 12 |
| 2007 | 10 | 12 |
| 2008 | 13 | 18 |
| 2009 | 12 | 8 |
| 2010 | 12 | 14 |
| 2011 | 10 | 19 |
| 2012 | 16 | 16 |
| 2013 | 15 | 15 |
| 2014 | 8 | 6 |
| 2015 | 9 | 5 |
| 2016 | 6 | 9 |
| 2017 | 7 | 13 |
| 2018 | 8 | 7 |
| 2019 | 9 | 10 |
| 2020 | 10 | 8 |
| 2021 | 8 | 8 |
| 2022 | 9 | 14 |
| 2023 | 7 | 7 |
| 2024 | 7 | 6 |
| 2025 | 8 | 6 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Handheld optical spectroscopy scanner3 Feb 2026US 12,540,849 B2Buchi Labortechnik AG
- Method for calibrating an apparatus for measuring the absorbance of light by a substance20 Jan 2026US 12,529,651 B2Cytiva Sweden AB
- Matched optical filter16 Dec 2025US 12,498,319 B2Redshift Bioanalytics, Inc.
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- Gas analyzer27 Aug 2026US 2026/0251558 A1Yokogawa Electric Corporation
- Optical measurement systems and techniques for water used in food and beverage processes9 Jul 2026US 2026/0194389 A1Ecolab USA Inc.
- Gas analysis device, exhaust gas analysis system, and gas analysis method11 Jun 2026US 2026/0160678 A1Horiba, Ltd.
- Matched optical filter26 Mar 2026US 2026/0086028 A1
Most cited
By later US patents
- Method of photometric in vitro determination of a blood gas parameter in a blood sample159US 5,525,518 ARadiometer Medical A/S · 1996
- Sample card transport method for biological sample testing machine159US 5,670,375 AbioMerieux Vitek, Inc. · 1997
- Systems and methods for fluorescence detection with a movable detection module127US 7,148,043 B2Bio-Rad Laboratories, Inc. · 2006
- Process for spectrophotometric analysis108US 5,223,715 AAmoco Corporation · 1993
- Automated sample analysis102US 7,595,197 B2Caliper Life Sciences, Inc. · 2009