US3812008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal ring for nuclear reactors
Assignee: Individual
•
Filing: 1970-05-20
•
Granted: 1974-05-21
•
Expires: 1990-05-20
Abstract
Abstract An inflatable seal ring for use between the annular surface of a nuclear reactor vessel and its surrounding biological shield, which forms part of the housing for the reactor vessel. The seal is used during refueling of the vessel to prevent water maintained in the refueling canal above the reactor vessel from entering the reactor cavity.
Inventors
- 👤 E Fryer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:50
CPC Classifications
G; G21; G21C; G21C19/00; G21C19/02; G21C13/00; G21C13/02; G21C13/028; 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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |