H01J 17/56
For preventing and then permitting ignition, but thereafter having no control
Official title: for preventing and then permitting ignition, but thereafter having no control
H01J17/56 (For preventing and then permitting ignition, but thereafter having no control) appears on 17 US grants and 0 published applications in this corpus.
Search patents in H01J- Granted patents
- 17
- Published applications
- 0
- Assignees
- 5
- Inventors
- 25
- Latest grant
- 13 Aug 1996
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Multiple surface high voltage structure for a gas discharge closing switch13 Aug 1996US 5,545,947 ALitton Systems, Inc.
- Cathode placement in a gas discharge closing switch19 Dec 1995US 5,477,106 ALitton Systems, Inc.
- Thyratron with annular keep-alive electrode19 Sep 1995US 5,451,836 ALitton Systems, Inc.
- Vacuum switch apparatus6 Aug 1991US 5,038,082 AHitachi, Ltd.
- Discharge tubes23 Jan 1990US 4,896,073 AEnglish Electric Valve Company Limited
No published applications in this class yet.
Most cited
By later US patents
- Vacuum switch apparatus9US 5,038,082 AHitachi, Ltd. · 1991
- Thyratrons3US 4,577,138 AEnglish Electric Valve Company Limited · 1986
- Double ended thyratron with trigger impulse means2US 4,081,719 AEnglish Electric Valve Company Limited · 1978
- Thyratrons2US 4,123,684 AEnglish Electric Valve Company Limited · 1978
- Electric circuit interrupting devices2US 4,620,135 AEnglish Electric Valve Company Limited · 1986