US3756786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel elements of graphite moderated high temperature reactors process and apparatus for the recovery of nuclear fuel material from
Assignee: Nukem GmbH
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Filing: 1970-11-30
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Granted: 1973-09-04
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Expires: 1990-11-30
Abstract
Abstract NUCLEAR FUEL ELEMENTS CONTAINING A GRAPHITE MODERATOR ARE REWORKED BY BURING THE UNGROUND FUEL ELEMENT CARBON IN A TWO STEP FIXED BED PROCESS WITH OXYGEN. THE STRUCTURAL AND MATRIX GRAPHITE ARE BURNED IN A FIRST STEP AT 800*C. TO 1100*C., AND THE PYROLYTIC CARBON IS BURNED IN A SECOND STEP AT A LOWER TEMPERATURE OF 600*C. TO 900*C. THERE IS ALSO DISCLOSED A SHAFT FURNACE FOR PERFORMING THE PROCESS.
Inventors
- 👤 U Tillessen
- 👤 K Engel
- 👤 K Hackstein
- 👤 D Habermann
- 👤 H Pirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:52
CPC Classifications
G; G21; G21C; G21C19/00; G21C19/42; G21C19/44; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y02W; Y02W30/00; Y02W30/50
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |