US3822140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for the production of coated-particle fuel for nuclear reactors
Assignee: Forschungszentrum Jülich
•
Filing: 1971-12-20
•
Granted: 1974-07-02
•
Expires: 1991-12-20
Abstract
Abstract A METHOD AND APPARATUS FOR COATING NUCLEAR FUEL PARTICLES IN A FLUIDIZED BED WITH CARBON DEPOITED FROM A PYROLYTICALLY DECOMPOSABLE GAS. THE STATIC LAYERS IN THE FLUIDIZED BED COATING SYSTEM ARE BROKEN UP BY GENERATING A VORTEX OR TWISTING DISPLACEMENT OF THE FLUIDIZED BED ABOUT ITS AXIS IN A DIVERGENT CONICAL FLUIDIZED BED CHAMBER. CARRIER GAS IS INTRODUCED AXIALLY INTO THE BOTTOM OF THE CHAMBER AND DOWNWARDLY AND TANGENTIALLY THROUGH OPENINGS IN THE WALL OF THE FLUIDIZED BED CHAMBER. THE TANGENTIALLY AND HELICAL MOVEMENT IMPARTED TO THE GASES IN THE CHAMBER RESULTS IN AN IMPROVED COATING UNIFORMITY ON THE PARTICLES.
Inventors
- 👤 C Wallroth
- 👤 E Gyarmati
- 👤 H Nickel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:45
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/42; G21C3/58; G21C3/62; G21C3/626; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10S; Y10S118/00; Y10S118/05
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |