G01N 21/94
Investigating contamination
Official title: Investigating contamination, e.g. dust (G01N21/85 takes precedence)
G01N21/94 (Investigating contamination) appears on 1,686 US grants and 1,785 published applications in this corpus.
Search patents in G01N- Granted patents
- 1,686
- Published applications
- 1,785
- Assignees
- 976
- Inventors
- 4,254
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 8 | 0 |
| 1987 | 12 | 0 |
| 1988 | 12 | 0 |
| 1989 | 12 | 0 |
| 1990 | 16 | 0 |
| 1991 | 20 | 0 |
| 1992 | 10 | 0 |
| 1993 | 18 | 0 |
| 1994 | 18 | 0 |
| 1995 | 20 | 0 |
| 1996 | 14 | 0 |
| 1997 | 17 | 0 |
| 1998 | 27 | 0 |
| 1999 | 28 | 0 |
| 2000 | 18 | 0 |
| 2001 | 19 | 12 |
| 2002 | 25 | 40 |
| 2003 | 33 | 34 |
| 2004 | 31 | 29 |
| 2005 | 31 | 35 |
| 2006 | 40 | 43 |
| 2007 | 37 | 65 |
| 2008 | 41 | 47 |
| 2009 | 42 | 50 |
| 2010 | 42 | 68 |
| 2011 | 53 | 49 |
| 2012 | 51 | 60 |
| 2013 | 35 | 49 |
| 2014 | 47 | 65 |
| 2015 | 52 | 67 |
| 2016 | 65 | 85 |
| 2017 | 73 | 96 |
| 2018 | 66 | 92 |
| 2019 | 87 | 104 |
| 2020 | 94 | 114 |
| 2021 | 74 | 103 |
| 2022 | 77 | 118 |
| 2023 | 82 | 100 |
| 2024 | 76 | 114 |
| 2025 | 94 | 74 |
| 2026 | 59 | 72 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Aerosol sensor and an integrated optical component thereof29 Sep 2026US 12,748,055 B2Honeywell International Inc.
- Method for detecting soiling22 Sep 2026US 12,742,738 B2BRAVE Analytics GmbH
- Environmental monitoring device using smart phone15 Sep 2026US 12,736,510 B2Deepvisions Co., Ltd.
- Biological indicators, and systems and methods for determining efficacy of sterilization1 Sep 2026US 12,723,273 B2Steritec Products Mfg. Co., Inc.
- Apparatus and method for non-contact detection of hydrocarbon and other fluorescence materials on a surface1 Sep 2026US 12,723,983 B2
- Spectroscopic based contaminant detection system8 Oct 2026US 2026/0309642 A1
- Temperature-specific performance deviation correction apparatus and correction method for photosensor detecting nephelometric turbidity units1 Oct 2026US 2026/0297831 A1LG Electronics Inc.
- Sample measurement system and sample measurement method1 Oct 2026US 2026/0298831 A1Sysmex Corporation
- Closed space monitoring system3 Sep 2026US 2026/0259035 A1Agat Co., Ltd.
- Method and system for characterizing a non-metallic inclusion population3 Sep 2026US 2026/0259148 A1Aktiebolaget Skf
Most cited
By later US patents
- System for detecting injection holding material1,074US 6,943,348 B1Masimo Corporation · 2005
- Particle detection method and apparatus362US 4,655,592 AHamamatsu Systems, Inc. · 1987
- Methods and systems for determining a critical dimension and a thin film characteristic of a specimen248US 6,633,831 B2KLA-Tencor Technologies Corporation · 2003
- Infrastructure monitoring system and method240US 9,202,362 B2Mueller International, LLC · 2015
- Sample inspection system235US 6,201,601 B1KLA-Tencor Corporation · 2001