Patent US3400511A successfully refreshed from Google Patents.
US3400511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for retaining radioactive exhaust gas
Assignee: Hitachi Ltd
•
Filing: 1966-08-03
•
Granted: 1968-09-10
•
Expires: 1986-08-03
Abstract
No abstract record available.
Inventors
- 👤 Hajime Yamanouchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:52
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PROCESS FOR TREATING AN EXHAUST GAS CONTAINING RADIOACTIVE GASES WHICH COMPRISES SELECTIVELY DIRECTING AN EXHAUST GAS LOW IN RADIOACTIVITY DIRECTLY TO THE ATMOSPHERE AND AN EXHAUST GAS HIGH IN RADIOACTIVITY TO THE FIRST OF A SERIES OF ABSORPTION RESERVOIRS SUBSTANTIALLY REMOVING THE RADIOACTIVE GASES FROM THE EXHAUST GAS IN SAID FIRST ABSORPTION RESERVOIR, DISCHARGING SAID TREATED EXHAUST GAS TO THE ATMOSPHERE, MONITORING SAID DISCHARGED GAS SUCH THAT WHEN THE RADIOACTIVITY OF SAID GAS REACHES A PREDETERMINED LEVEL THE FIRST ABSORPTION RESERVOIR IS BYPASSED AND THE EXHAUST GAS CONTAINING RADIOACTIVE GASES IS DIRECTED TO A SECOND RESERVOIR AND SUCCEEDING RESERVOIRS AS THE ADSORBING CAPACITY OF EACH RESERVOIR IS IN TURN SPENT.
Claim 2
Dependent Claim
111 words
A PROCESS FOR TREATING AN EXHAUST GAS CONTAINING RADIOACTIVE GASES WHICH COMPRISES SELECTIVELY DIRECTING AN EXHAUST GAS LOW IN RADIOACTIVITY DIRECTLY TO THE ATMOSPHERE AND AN EXHAUST GAS HIGH IN RADIOACTIVITY TO THE FIRST OF A SERIES OF ABSORPTION RESERVOIRS SUBSTANTIALLY REMOVING THE RADIOACTIVE GASES FROM THE EXHAUST GAS IN SAID FIRST ABSORPTION RESERVOIR, DISCHARGING SAID TREATED EXHAUST GAS TO THE ATMOSPHERE, MONITORING SAID DISCHARGED GAS SUCH THAT WHEN THE RADIOACTIVITY OF SAID GAS REACHES A PREDETERMINED LEVEL THE FIRST ABSORPTION RESERVOIR IS BYPASSED AND THE EXHAUST GAS CONTAINING RADIOACTIVE GASES IS DIRECTED TO A SECOND RESERVOIR AND SUCCEEDING RESERVOIRS AS THE ADSORBING CAPACITY OF EACH RESERVOIR IS IN TURN SPENT.
References Cited (Backward Citations)
US1892428A
Cited
US3197377A
Cited
US2703628A
Cited
US3002583A
Cited
US3093564A
Cited
US3257314A
Cited
US3257772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |