G02B 7/007
Pressure-resistant sight glasses
Official title: {Pressure-resistant sight glasses}
G02B7/007 (Pressure-resistant sight glasses) appears on 116 US grants and 62 published applications in this corpus.
Search patents in G02B- Granted patents
- 116
- Published applications
- 62
- Assignees
- 88
- Inventors
- 221
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 5 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 7 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 1 |
| 2002 | 5 | 2 |
| 2003 | 2 | 2 |
| 2004 | 0 | 2 |
| 2005 | 2 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 3 |
| 2009 | 1 | 1 |
| 2010 | 2 | 1 |
| 2011 | 1 | 4 |
| 2012 | 1 | 2 |
| 2013 | 1 | 2 |
| 2014 | 0 | 3 |
| 2015 | 4 | 3 |
| 2016 | 3 | 4 |
| 2017 | 2 | 3 |
| 2018 | 1 | 2 |
| 2019 | 2 | 5 |
| 2020 | 3 | 3 |
| 2021 | 6 | 7 |
| 2022 | 1 | 2 |
| 2023 | 5 | 2 |
| 2024 | 0 | 0 |
| 2025 | 2 | 1 |
| 2026 | 2 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Optical process lens of a transparent ceramic25 Aug 2026US 12,717,111 B1L.J. Star, Incorporated
- Lens assembly, camera module and electronic device6 Jan 2026US 12,517,320 B2Largan Precision Co., Ltd.
- Ultra-high-vacuum cell with integrated meta-optics9 Sep 2025US 12,411,263 B2ColdQuanta, Inc.
- Plasma viewport8 Apr 2025US 12,272,534 B2Lam Researh Corporation
- Sanitary in-line sight glass assembly14 Nov 2023US 11,815,730 B2Dixon Valve and Coupling Company
- Asymmetric mounting apparatus23 Apr 2026US 2026/0110870 A1Element Six Technologies Limited
- Lens assembly, camera module and electronic device2 Apr 2026US 2026/0093087 A1Largan Precision Co., Ltd.
- Ultra-high-vacuum cell with integrated meta-optics1 Jan 2026US 2026/0003103 A1ColdQuanta, Inc.
- Seal for optical elements1 Jan 2026US 2026/0003153 A1II-Vi Delaware, Inc.
- Viewport assembly for an extreme ultraviolet light source1 Jan 2026US 2026/0003298 A1ASML Netherlands B. V.
Most cited
By later US patents
- In-line sight indicator44US 5,383,338 AEmerson Electric Co. · 1995
- Sight glass for observing lubricant in the lower gearcase of marine engines34US 4,757,710 A1988
- Quick change lens mount32US 4,281,895 AQuantor Corporation · 1981
- Protective window assembly and method of using the same for a laser beam generating apparatus31US 6,270,222 B12001
- Camera viewing unit29US 4,977,418 A1990