Patent US1201002A successfully refreshed from Google Patents.
Patent US2957084A successfully refreshed from Google Patents.
US2957084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alpha air monitor
Assignee: Atomic Energy of Canada Ltd AECL
•
Filing: 1956-04-20
•
Granted: 1960-10-18
•
Expires: 1976-04-20
Abstract
No abstract record available.
Inventors
- 👤 Marr John Douglas
- 👤 Cross William Gunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:17
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/17; G01T1/178; Y; Y10; Y10S; Y10S250/00; Y10S250/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A RADIATION COUNTER FOR COUNTING RADIATION FROM LONG-LIVED ALPHA EMITTERS IN THE PRESENCE OF ALPHA RADIATION FROM SHORT-LIVED EMITTERS WHERE THE RADIATION OF EACH ALPHA PARTICLE FROM THE SHORT-LIVED EMITTERS IS IMMEDIATELY PRECEDED BY THE RADIATION OF A BETA PARTICLE FROM THE SAME SHORT-LIVED EMITTER COMPRISING A FIRST RADIATION DETECTOR ADAPTED TO PRODUCE FIRST ELECTRICAL PULSES WHEN TRIGGERED BY THE ALPHA RADIATIONS, A SECOND RADIATION DETECTOR ADAPTED TO PRODUCE SECOND ELECTRICAL PULSES WHEN TRIGGERED BY THE BETA RADIATION, FIRST COUNTING MEANS FOR COUNTING THE FIRST ELECTRICAL PULSES, AND MEANS TRIGGERED BY EACH OF THE SECOND ELECTRICAL PULSES FOR BLOCKING THE COUNTING OF THE FIRST COUNTING MEANS FOR A PREDETERMINED TIME FOLLOWING EACH OF THE SECOND ELECTRICAL PULSES.
Claim 2
Dependent Claim
117 words
A RADIATION COUNTER FOR COUNTING RADIATION FROM LONG-LIVED ALPHA EMITTERS IN THE PRESENCE OF ALPHA RADIATION FROM SHORT-LIVED EMITTERS WHERE THE RADIATION OF EACH ALPHA PARTICLE FROM THE SHORT-LIVED EMITTERS IS IMMEDIATELY PRECEDED BY THE RADIATION OF A BETA PARTICLE FROM THE SAME SHORT-LIVED EMITTER COMPRISING A FIRST RADIATION DETECTOR ADAPTED TO PRODUCE FIRST ELECTRICAL PULSES WHEN TRIGGERED BY THE ALPHA RADIATIONS, A SECOND RADIATION DETECTOR ADAPTED TO PRODUCE SECOND ELECTRICAL PULSES WHEN TRIGGERED BY THE BETA RADIATION, FIRST COUNTING MEANS FOR COUNTING THE FIRST ELECTRICAL PULSES, AND MEANS TRIGGERED BY EACH OF THE SECOND ELECTRICAL PULSES FOR BLOCKING THE COUNTING OF THE FIRST COUNTING MEANS FOR A PREDETERMINED TIME FOLLOWING EACH OF THE SECOND ELECTRICAL PULSES.
References Cited (Backward Citations)
US2445305A
Cited
US2598215A
Cited
US2724060A
Cited
US2727154A
Cited
US2741709A
Cited
US2831121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |