G01N 21/43
By measuring critical angle
Official title: by measuring critical angle
G01N21/43 (By measuring critical angle) appears on 392 US grants and 250 published applications in this corpus.
Search patents in G01N- Granted patents
- 392
- Published applications
- 250
- Assignees
- 295
- Inventors
- 909
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 5 | 0 |
| 1981 | 6 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 5 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 11 | 0 |
| 1988 | 2 | 0 |
| 1989 | 17 | 0 |
| 1990 | 16 | 0 |
| 1991 | 18 | 0 |
| 1992 | 12 | 0 |
| 1993 | 9 | 0 |
| 1994 | 5 | 0 |
| 1995 | 12 | 0 |
| 1996 | 8 | 0 |
| 1997 | 8 | 0 |
| 1998 | 10 | 0 |
| 1999 | 6 | 0 |
| 2000 | 8 | 0 |
| 2001 | 4 | 1 |
| 2002 | 8 | 8 |
| 2003 | 6 | 14 |
| 2004 | 9 | 15 |
| 2005 | 8 | 4 |
| 2006 | 9 | 10 |
| 2007 | 8 | 5 |
| 2008 | 8 | 11 |
| 2009 | 9 | 12 |
| 2010 | 9 | 13 |
| 2011 | 6 | 11 |
| 2012 | 7 | 12 |
| 2013 | 10 | 6 |
| 2014 | 10 | 10 |
| 2015 | 10 | 12 |
| 2016 | 10 | 11 |
| 2017 | 8 | 6 |
| 2018 | 15 | 14 |
| 2019 | 10 | 14 |
| 2020 | 8 | 9 |
| 2021 | 10 | 13 |
| 2022 | 8 | 17 |
| 2023 | 9 | 10 |
| 2024 | 8 | 8 |
| 2025 | 4 | 2 |
| 2026 | 6 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Critical angle reflection imaging for quantification of molecular interactions11 Aug 2026US 12,704,458 B2Arizona Board of Regents on behalf of Arizona State University
- Refractometer and method for measuring refractive index28 Apr 2026US 12,613,186 B2Shenzhen Digitizing Fluid Technology Co., Ltd.
- Hybrid systems and methods for characterizing stress in chemically strengthened transparent substrates21 Apr 2026US 12,607,560 B2Corning Incorporated
- Apparatuses, systems, and methods for sample testing17 Feb 2026US 12,553,885 B2Hand Held Products, Inc.
- Measurement apparatus and refrigeration system comprising same27 Jan 2026US 12,535,252 B2Tyco Fire & Security GmbH
- Detection system30 Jul 2026US 2026/0219180 A1SKYLA Corporation
- Fiber-optic seawater salinity sensor system and preparation method thereof30 Apr 2026US 2026/0118261 A1Tianjin University
- System and method for simultaneously measuring refractive index and turbidity5 Jun 2025US 2025/0179410 A1
- Apparatus and method for measuring a sample27 Feb 2025US 2025/0067668 A1Schlumberger Technology Corporation
- Detection tube, detection system and optical detection method for parameter of test specimen5 Dec 2024US 2024/0402080 A1SKYLA Corporation
Most cited
By later US patents
- Compact moisture sensor with collimator lenses and prismatic coupler508US 5,661,303 ALibbey-Owens-Ford Co. · 1997
- Vehicular moisture sensor and mounting apparatus therefor456US 4,871,917 ADonnelly Corporation · 1989
- Optoelectronic sensor for detecting moisture on a windshield with means to compensate for a metallic layer in the windshield430US 5,498,866 ALeopold Kostal GmbH & Co. KG · 1996
- Vehicular moisture sensor and mounting apparatus therefor305US 4,973,844 ADonnelly Corporation · 1990
- Optical sensor for selective detection of substances and/or for the detection of refractive index changes in gaseous, liquid, solid and porous samples262US 4,815,843 AOerlikon-Buhrle Holding AG · 1989