G01N 21/15
Preventing contamination of the components of the optical system or obstruction of
Official title: Preventing contamination of the components of the optical system or obstruction of the light path
G01N21/15 (Preventing contamination of the components of the optical system or obstruction of) appears on 742 US grants and 779 published applications in this corpus.
Search patents in G01N- Granted patents
- 742
- Published applications
- 779
- Assignees
- 585
- Inventors
- 1,961
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 8 | 0 |
| 1989 | 8 | 0 |
| 1990 | 5 | 0 |
| 1991 | 1 | 0 |
| 1992 | 9 | 0 |
| 1993 | 7 | 0 |
| 1994 | 6 | 0 |
| 1995 | 10 | 0 |
| 1996 | 7 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 10 | 0 |
| 2001 | 9 | 2 |
| 2002 | 12 | 10 |
| 2003 | 11 | 13 |
| 2004 | 11 | 13 |
| 2005 | 6 | 26 |
| 2006 | 16 | 24 |
| 2007 | 16 | 26 |
| 2008 | 19 | 26 |
| 2009 | 18 | 34 |
| 2010 | 26 | 34 |
| 2011 | 15 | 33 |
| 2012 | 22 | 19 |
| 2013 | 32 | 26 |
| 2014 | 27 | 43 |
| 2015 | 30 | 26 |
| 2016 | 28 | 42 |
| 2017 | 27 | 39 |
| 2018 | 44 | 42 |
| 2019 | 44 | 52 |
| 2020 | 45 | 43 |
| 2021 | 32 | 56 |
| 2022 | 36 | 44 |
| 2023 | 37 | 31 |
| 2024 | 32 | 32 |
| 2025 | 30 | 24 |
| 2026 | 11 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Measurement instrument, measurement device, measurement system, and measurement method15 Sep 2026US 12,736,462 B2HORIBA Advanced Techno, Co., Ltd.
- Apparatus and method for cleaning an inspection system8 Sep 2026US 12,730,059 B2ASML Netherlands B. V.
- Equipment for measuring the content of organic substances in water emulsions and solutions25 Aug 2026US 12,716,830 B2PBT Works s.r.o.
- Process isolation device, a method for inserting a process sensor probe into a process location and a method for removing a process sensor probe from a process location11 Aug 2026US 12,704,391 B2Kxs Technologies Oy
- Molten salt impurity sensor2 Jun 2026US 12,644,829 B2Wisconsin Alumni Research Foundation
- Spectrophotometer, cleaning unit, and method for cleaning spectrophotometer16 Jul 2026US 2026/0199940 A1Thermo Fisher Scientific (Shanghai) Instruments Co., Ltd.
- Optical measurement systems and techniques for water used in food and beverage processes9 Jul 2026US 2026/0194389 A1Ecolab USA Inc.
- Contaminated optics detection for a thermal imager25 Jun 2026US 2026/0177505 A1Seek Thermal, Inc.
- Probe for liquid analysis18 Jun 2026US 2026/0168931 A1Watergenics GmbH
- Wastewater testing apparatus and cleaning device4 Jun 2026US 2026/0153431 A1Beijing Roborock Technology Co., Ltd.
Most cited
By later US patents
- Permanent optical sensor downhole fluid analysis systems147US 6,437,326 B1Schlumberger Technology Corporation · 2002
- In situ optical computation fluid analysis system and method131US 7,697,141 B2Halliburton Energy Services.Inc. · 2010
- Gas analysis system having buffer gas inputs to protect associated optical elements123US 5,153,671 ABOC Health Care, Inc. · 1992
- Method and apparatus for protecting surfaces of optical components119US 7,138,640 B1KLA-Tencor Technologies Corporation · 2006
- Biocompatible apparatus for ultrasensitive and rapid detection of contaminants in liquids73US 6,473,171 B1Coors Brewing Company · 2002