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Patent US3679545A successfully refreshed from Google Patents.
US3679545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nuclear fuel rod
Assignee: Babcock and Wilcox Co
•
Filing: 1969-06-02
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Granted: 1972-07-25
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Expires: 1989-06-02
Abstract
Abstract A NUCLEAR REACTOR CORE ELEMENT UTILIZING ONE OR MORE CORRUGATED TUBULAR SPACER MEMBERS THAT RESILIENTLY SUPPORT AND LOCATE WITHIN A SEALED CLADDING TUBE EITHER A BODY OF NUCLEAR FUEL MATERIAL OR A BODY OF NEUTRON ABSORBER MATERIAL. EACH CORRUGATED SPACER MEMBER IS LOCATED IN A PLENUM ZONE WITHIN THE CLADDING TUBE AND RADIALLY REINFORES THE TUBE WALL SECTION AROUND SUCH PLENUM ZONE AGAINST COLLAPSE BY EXTERNAL FLUID PRESSURE.
Inventors
- 👤 Raymond M Leirvik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:58
CPC Classifications
G; G21; G21C; G21C7/00; G21C7/06; G21C7/08; G21C7/10; G21C3/00; G21C3/02; G21C3/04; G21C3/16; G21C3/17; G21C3/18; 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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |