F21V 9/04
Elements for modifying spectral properties, polarisation or intensity of the light emitted
Official title: for filtering out infrared radiation (dichroic reflectors F21V7/22; using liquid-filled chambers F21V9/12)
F21V9/04 (Elements for modifying spectral properties, polarisation or intensity of the light emitted) appears on 185 US grants and 116 published applications in this corpus.
Search patents in F21V- Granted patents
- 185
- Published applications
- 116
- Assignees
- 117
- Inventors
- 314
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 7 | 0 |
| 1995 | 1 | 0 |
| 1996 | 6 | 0 |
| 1997 | 6 | 0 |
| 1998 | 7 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 6 | 1 |
| 2002 | 6 | 7 |
| 2003 | 5 | 5 |
| 2004 | 2 | 2 |
| 2005 | 4 | 7 |
| 2006 | 2 | 5 |
| 2007 | 4 | 6 |
| 2008 | 3 | 7 |
| 2009 | 1 | 3 |
| 2010 | 3 | 2 |
| 2011 | 3 | 2 |
| 2012 | 1 | 2 |
| 2013 | 1 | 10 |
| 2014 | 5 | 4 |
| 2015 | 7 | 9 |
| 2016 | 5 | 7 |
| 2017 | 8 | 8 |
| 2018 | 7 | 2 |
| 2019 | 7 | 6 |
| 2020 | 5 | 5 |
| 2021 | 3 | 5 |
| 2022 | 4 | 4 |
| 2023 | 5 | 2 |
| 2024 | 3 | 1 |
| 2025 | 1 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Illumination systems employing laminated sheet-form optical structures with embedded TIR channels14 Jul 2026US 12,680,670 B2S.V.V. Technology Innovations, Inc.
- Method of making daylight redirecting window films employing embedded microstructures20 May 2025US 12,305,819 B2S.V.V. Technology Innovations, Inc.
- Light control film24 Dec 2024US 12,174,407 B23M Innovative Properties Company
- Economical surgical lighting device and method of assembly22 Oct 2024US 12,123,569 B2Maquet GmbH
- Lighting devices for automatically switching between a visible light source and an infrared light source27 Feb 2024US 11,914,178 B2Zhejiang Dahua Technology Co., Ltd.
- Illumination systems employing multi-layer laminated sheet-form optical structures with embedded tir channels17 Sep 2026US 2026/0276175 A1
- A structure for facilitating spectrally selective transformation of light waves23 Apr 2026US 2026/0110418 A1Iyris Technology Ltd
- Light control film27 Feb 2025US 2025/0067914 A13M Innovative Properties Company
- Illumination systems employing laminated sheet-form optical structures with embedded tir channels16 Jan 2025US 2025/0020296 A1S.V.V. Technology Innovations, Inc.
- Device and method for disinfecting a working volume in an artificial space environment via solar uv radiation8 Aug 2024US 2024/0261450 A1Istituto Nazionale Di Astrofisica
Most cited
By later US patents
- High intensity lighting projectors319US 5,282,121 AVari-Lite, Inc. · 1994
- Light expanding system for producing a linear or planar light beam from a point-like light source189US 5,835,661 A1998
- Lighting device165US 4,947,291 A1990
- Apparatus for irradiating substances curable by radiation159US 4,298,806 AESPE Fabrik Pharmazeutischer Praparate GmbH · 1981
- Light expanding system for producing a linear or planar light beam from a point-like light source154US 5,506,929 AClio Technologies, Inc. · 1996