H01J 41/08
With ionisation by means of radioactive substances
Official title: with ionisation by means of radioactive substances, e.g. alphatrons
H01J41/08 (With ionisation by means of radioactive substances) appears on 11 US grants and 0 published applications in this corpus.
Search patents in H01J- Granted patents
- 11
- Published applications
- 0
- Assignees
- 9
- Inventors
- 19
- Latest grant
- 15 Oct 1991
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Glow discharge starter having dual gaps15 Oct 1991US 5,057,741 AGTE Products Corporation
- Pressure sensor and leak detector22 May 1984US 4,450,409 AHoneywell Inc.
- Smoke detector apparatus and ionization chamber therefor11 Sep 1979US 4,167,687 AUnitec S.P.A.
- Double chamber ionization smoke detector8 May 1979US 4,153,840 A
- Reliable dynamoelectric machine condition monitor24 Oct 1978US 4,121,458 AWestinghouse Electric Corp.
No published applications in this class yet.
Most cited
By later US patents
- Reliable dynamoelectric machine condition monitor19US 4,121,458 AWestinghouse Electric Corp. · 1978
- Rate-of-change combustion and contamination detection device9US 3,946,374 ASCI Systems, Inc. · 1976
- Multi-element ionization chamber9US 4,012,729 AStatitrol Corporation · 1977
- Ionization detector9US 4,021,671 AGulf & Western Manufacturing Company (Systems) · 1977
- Pressure sensor and leak detector6US 4,450,409 AHoneywell Inc. · 1984