H01J 61/825
High-pressure sodium lamps
Official title: {High-pressure sodium lamps}
H01J61/825 (High-pressure sodium lamps) appears on 76 US grants and 16 published applications in this corpus.
Search patents in H01J- Granted patents
- 76
- Published applications
- 16
- Assignees
- 33
- Inventors
- 165
- Latest grant
- 25 Mar 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 12 | 0 |
| 1991 | 0 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 1 |
| 2003 | 3 | 1 |
| 2004 | 2 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 0 | 1 |
| 2011 | 2 | 0 |
| 2012 | 1 | 3 |
| 2013 | 1 | 0 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 2 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- High-pressure discharge lamp, in particular high-pressure sodium-vapor lamp, with improved ignitability25 Mar 2025US 12,261,035 B2Ushio Germany GmbH
- High PAR maintenance rate type high pressure sodium lamp with auxiliary starting switch26 Feb 2019US 10,217,624 B2Fanlight Co., Ltd.
- High-pressure sodium lamp lighting device11 Dec 2018US 10,153,152 B2Iwasaki Electric Co., Ltd.
- Mercury-free metal halide lamp for vehicle and metal halide lamp device16 Sep 2014US 8,836,217 B2Toshiba Lighting & Technology Corporation
- High pressure sodium lamp28 May 2013US 8,450,932 B2
- High-pressure discharge lamp, in particular high-pressure sodium-vapor lamp, with improved ignitability29 Dec 2022US 2022/0415642 A1Ushio Germany GmbH
- High PAR Maintenance Rate Type High Pressure Sodium Lamp with Auxiliary Starting Switch26 Apr 2018US 2018/0114688 A1Fanlight Co., Ltd.
- High-pressure sodium lamp lighting device26 Apr 2018US 2018/0114689 A1Iwasaki Electric Co., Ltd.
- Mercury-Free Metal Halide Lamp for Vehicle and Metal Halide Lamp Device8 May 2014US 2014/0125224 A1Toshiba Lighting & Technology Corporation
- Polycrystalline transluscent alumina for high intensity discharge lamps6 Dec 2012US 2012/0306365 A1General Electric Company
Most cited
By later US patents
- High pressure sodium lamp of low power75US 6,051,927 APatent-Truehand-Gesellschaft fuer elektrische Gluelampen mbH · 2000
- High-pressure sodium lamp74US 5,510,676 AU. S. Philips Corporation · 1996
- High pressure sodium lamp74US 5,698,947 ASamsung Display Devices Co., Ltd. · 1997
- High pressure sodium discharge lamp having gas filled outer envelope56US 4,977,346 ANorth American Philips Corporation · 1990
- Translucent polycrystalline ceramic and method for making same36US 6,417,127 B1Ngk Spark Plug Co., Ltd. · 2002