H01J 61/322
Circular lamps
Official title: {Circular lamps}
H01J61/322 (Circular lamps) appears on 30 US grants and 17 published applications in this corpus.
Search patents in H01J- Granted patents
- 30
- Published applications
- 17
- Assignees
- 19
- Inventors
- 77
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 4 |
| 2003 | 3 | 3 |
| 2004 | 3 | 0 |
| 2005 | 0 | 0 |
| 2006 | 2 | 3 |
| 2007 | 1 | 1 |
| 2008 | 1 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Light emitting plasma lamp bulb for solar UV simulation and lamp comprising the same24 Mar 2026US 12,586,772 B2Korea Research Institute of Chemical Technology
- Plasma light engine24 Dec 2024US 12,176,201 B2
- High power low pressure UV bulb with plasma resistant coating16 Jul 2019US 10,354,857 B2Lam Research Corporation
- Manufacturing method of arc tube having a glass tube of a flat-spiral shape, arc tube, and fluorescent lamp20 Jan 2009US 7,479,049 B2Panasonic Corporation
- Fluorescent lamp including a multi-ringed bulb28 Oct 2008US 7,443,092 B2Toshiba Lighting & Technology Corporation
- Light emitting plasma lamp bulb for solar uv simulation and lamp comprising the same22 Feb 2024US 2024/0063011 A1Korea Research Institute of Chemical Technology
- Plasma light engine25 May 2023US 2023/0162968 A1
- High power low pressure uv bulb with plasma resistant coating28 Jun 2018US 2018/0182607 A1Lam Research Corporation
- Method of manufacturing fluorescent lamp and fluorescent lamp manufactured using the same3 Dec 2015US 2015/0348735 A1
- Discharge lamp14 Aug 2008US 2008/0191599 A1
Most cited
By later US patents
- Dimmable electrodeless light source66US 6,246,183 B1Litton Systems, Inc. · 2001
- Low-pressure mercury vapor discharge lamp and illuminator20US 6,337,539 B12002
- Circular fluorescent lamp13US 5,034,655 AHitachi, Ltd. · 1991
- Annulus fluorescent lamp with overheat protection10US 5,977,692 AMatsushita Electronics Corporation · 1999
- Curved shatter-resistant lamp assembly and method9US 6,043,600 ARoyal Lite Manufacturing and Supply Corp. · 2000