H01J 61/74
Having a main light-emitting filling of difficult vaporisable metal vapour
Official title: having a main light-emitting filling of difficult vaporisable metal vapour, e.g. sodium
H01J61/74 (Having a main light-emitting filling of difficult vaporisable metal vapour) appears on 8 US grants and 1 published applications in this corpus.
Search patents in H01J- Granted patents
- 8
- Published applications
- 1
- Assignees
- 5
- Inventors
- 16
- Latest grant
- 10 Jun 1997
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Low pressure sodium-mercury lamp yielding substantially white light10 Jun 1997US 5,637,965 AMatsushita Electric Works R&D Laboratory, Inc.
- Low-pressure sodium discharge lamp8 Apr 1997US 5,619,090 AU. S. Philips Corporation
- Emission device with a cadmium lamp31 Dec 1996US 5,589,735 AUshiodenki Kabushiki Kaisha
- Low-pressure sodium discharge lamp having a collar-like heat shield28 Feb 1989US 4,808,877 AU. S. Philips Corporation
- Low-pressure sodium vapor discharge lamp with protective glass layer on electrode lead-throughs8 Nov 1988US 4,783,612 AU. S. Philips Corporation
Most cited
By later US patents
- Low-pressure sodium discharge lamp having a collar-like heat shield8US 4,808,877 AU. S. Philips Corporation · 1989
- Sodium vapor lamp with emission aperture6US 4,080,545 AXerox Corporation · 1978
- Emission device with a cadmium lamp6US 5,589,735 AUshiodenki Kabushiki Kaisha · 1996
- Low-pressure sodium vapor discharge lamp with protective glass layer on electrode lead-throughs5US 4,783,612 AU. S. Philips Corporation · 1988
- Low-pressure sodium discharge lamp3US 5,619,090 AU. S. Philips Corporation · 1997