Patent US3291986A successfully refreshed from Google Patents.
US3291986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monitor for air-borne beryllium
Assignee: Aerojet Rocketdyne Inc
•
Filing: 1962-08-13
•
Granted: 1966-12-13
•
Expires: 1982-08-13
Abstract
No abstract record available.
Inventors
- 👤 Irvin E Lamb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:08
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/22; G01N23/221; G01T; G01T7/00; G01T7/02; G01T7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A MONITOR FOR AIR-BORNE BERYLLIUM OR THE LIKE COMPRISING: MEANS FOR FILTERING PARTICLES FROM THE AIR HAVING AN AIR PERMEABLE FILTER ELEMENT DISPOSED THEREIN, AND A SOURCE OF RADIOACTIVE PARTICLES INTEGRALLY DISPERSED WITHIN SAID AIR PERMEABLE FILTER ELEMENT WHEREBY THE RADIOACTIVE PARTICLES FROM SAID SOURCE REACT WITH THE BERYLLIUM COLLECTED UPON AND WITHIN SAID FILTER ELEMENT PRODUCING SECONDARY RADIATION PROPORTIONAL TO THE BERRYLLIUM COLLECTED.
Claim 2
Dependent Claim
64 words
A MONITOR FOR AIR-BORNE BERYLLIUM OR THE LIKE COMPRISING: MEANS FOR FILTERING PARTICLES FROM THE AIR HAVING AN AIR PERMEABLE FILTER ELEMENT DISPOSED THEREIN, AND A SOURCE OF RADIOACTIVE PARTICLES INTEGRALLY DISPERSED WITHIN SAID AIR PERMEABLE FILTER ELEMENT WHEREBY THE RADIOACTIVE PARTICLES FROM SAID SOURCE REACT WITH THE BERYLLIUM COLLECTED UPON AND WITHIN SAID FILTER ELEMENT PRODUCING SECONDARY RADIATION PROPORTIONAL TO THE BERRYLLIUM COLLECTED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |