G02B 5/23
Photochromic filters
G02B5/23 (Photochromic filters) appears on 775 US grants and 790 published applications in this corpus.
Search patents in G02B- Granted patents
- 775
- Published applications
- 790
- Assignees
- 300
- Inventors
- 1,414
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 8 | 0 |
| 1994 | 7 | 0 |
| 1995 | 17 | 0 |
| 1996 | 13 | 0 |
| 1997 | 12 | 0 |
| 1998 | 16 | 0 |
| 1999 | 22 | 0 |
| 2000 | 14 | 0 |
| 2001 | 19 | 3 |
| 2002 | 20 | 17 |
| 2003 | 14 | 22 |
| 2004 | 16 | 16 |
| 2005 | 10 | 18 |
| 2006 | 12 | 10 |
| 2007 | 9 | 33 |
| 2008 | 15 | 24 |
| 2009 | 13 | 33 |
| 2010 | 10 | 24 |
| 2011 | 29 | 28 |
| 2012 | 24 | 40 |
| 2013 | 23 | 32 |
| 2014 | 36 | 62 |
| 2015 | 42 | 55 |
| 2016 | 38 | 40 |
| 2017 | 33 | 35 |
| 2018 | 44 | 49 |
| 2019 | 32 | 40 |
| 2020 | 34 | 30 |
| 2021 | 30 | 42 |
| 2022 | 29 | 41 |
| 2023 | 22 | 41 |
| 2024 | 30 | 30 |
| 2025 | 33 | 13 |
| 2026 | 14 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Lens having functional dots of different heights1 Sep 2026US 12,724,185 B2Flo Optics Ltd
- Indenonaphthopyrans having trialkylsilyl and ethylenically unsaturated groups11 Aug 2026US 12,703,712 B2Transitions Optical, Inc.
- Optical filters affecting color vision in a desired manner and design method thereof by non-linear optimization28 Jul 2026US 12,693,552 B2EnChroma, Inc.
- Ophthalmic article in particular for sunglasses7 Jul 2026US 12,675,004 B2Essilor International
- Color enhancement utilizing up converters and/or down converters19 May 2026US 12,630,725 B2Immunolight, LLC
- Higher-molecular photochromic dyes having at least one and not more than four naphthopyran subunits and multiple polyether chains1 Oct 2026US 2026/0297330 A1
- Heatable Photochromic Optical Article and Method of Making the Same3 Sep 2026US 2026/0259435 A1Transitions Optical, Inc.
- Photochromic compound, photochromic composition, photochromic article and spectacles13 Aug 2026US 2026/0234119 A1Hoya Lens Thailand Ltd.
- Adhesive composition, cured body, laminate, optical article, lens, and spectacles13 Aug 2026US 2026/0234454 A1Tokuyama Corporation
- Optical component and light control device using the optical component2 Jul 2026US 2026/0184145 A1Nissan Motor Co., Ltd.
Most cited
By later US patents
- See-through near-eye display glasses with a fast response photochromic film system for quick transition from dark to clear321US 9,129,295 B2Microsoft Technology Licensing, LLC · 2015
- Photochromic indeno-fused naphthopyrans245US 5,645,767 ATransitions Optical, Inc. · 1997
- Photochromic naphthopyran compounds213US 5,274,132 ATransitions Optical, Inc. · 1993
- Low EMI multiplexed dual display197US 6,346,698 B1Gentex Corporation · 2002
- Electrochromic media with concentration-enhanced stability, process for the preparation thereof and use in electrochromic devices195US 6,137,620 AGentex Corporation · 2000