Patent US3686071A successfully refreshed from Google Patents.
US3686071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bimetallic spacer grid
Assignee: Combustion Engineering Inc
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Filing: 1969-08-19
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Granted: 1972-08-22
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Expires: 1989-08-19
Abstract
Abstract A BIMETALLIC SPACER GRID FOR FUEL ELEMENT SUPPORT IN NUCLEAR REACTORS. A PLURALITY OF SPACER ELEMENTS FORMED FROM A FIRST MATERIAL HAVING CHARACTERISTIC LOW NEUTRON CAPTURE CROSS SECTION ARE MATED WITH SPRING FERRULES FORMED OF A SECOND MATERIAL HAVING BETTER STRESS RELAXATION PROPERTIES THAN THE FIRST MATERIAL SO AS NOT TO SUFFER SUBSTANTIAL DECREASE IN RESILIENCY DUE TO PROLONGED EXPOSURE TO INTENSIVE RADIATION. THE SPRING FERRULES ARE INTERCONNECTED IN A SEPARATE MATRIX SO AS TO ALWAYS BE RETAINED WITHIN THE SPACER GRID ARRANGEMENT.
Inventors
- 👤 Albert L Gaines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:57
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/30; G21C3/32; G21C3/34; G21C3/356; 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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |