Patent US3700550A successfully refreshed from Google Patents.
US3700550A
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US
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Process for purifying water utilized in a boiling water reactor
Assignee: DANIEL A SHIELLS
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Filing: 1969-11-21
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Granted: 1972-10-24
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Expires: 1989-11-21
Abstract
Abstract The purity of reactor coolant is controlled by removing a stream of water from the reactor system at the pressure existing in the reactor. The removed stream is then passed to at least one low pressure area wherein the pressure is reduced to release flash steam which is employed to heat feedwater fed to the system. The water remaining after flashing in filtered to remove solids and is demineralized and is then returned as pure feedwater to the system.
Inventors
- 👤 Daniel A Shiells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:02
CPC Classifications
G; G21; G21C; G21C19/00; G21C19/28; G21C19/30; G21C19/307; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |