US3286343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparation of a composite guide tube for nuclear reactor, and devices for the practical application of same
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1963-01-23
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Granted: 1966-11-22
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Expires: 1983-01-23
Abstract
No abstract record available.
Inventors
- 👤 Alfille Lucien
- 👤 Barriere Andre
- 👤 Farges Guy
- 👤 Rodier George
- 👤 Rozenholc Michel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:02
CPC Classifications
F; F16; F16L; F16L15/00; F16L15/006; F16L13/00; F16L13/02; F16L13/04; F16L9/00; F16L9/14; G; G21; G21C; G21C1/00; G21C1/04; G21C1/06; G21C1/14; G21C1/16; G21C1/18; G21C1/20; G21C15/00; G21C15/20; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49879; Y10T29/49881; Y10T29/4998
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
METHOD OF PREPARATION OF A COMPOSITE GUIDE TUBE WHICH IS DESIGNED FOR NUCLEAR REACTORS OF THE COOL PRESSURE TUBE TYPE AND TRHOUGH WHICH A COOLANT CIRCULATES, IN WHICH A HEAT-INSULATING REFRACTORY POWDER IS PLACED ON A RIGID INNER TUBE, THE SAID POWDER IS SURROUNDING BY A FLEXIBLE ENVELOPE TUBE AND THEN COMPRESSED TO A PREDETERMINED VALUE, THE COMPOSITE GUIDE TUBE ASSEMBLY WHICH IS THUS OBTAINED IS SUBJECTED TO AT LEAST ONE CYCLE OF INTERNAL HEATING AT A TEMPERATURE WHICH IS HIGHER THAN THE OPERATING TEMPERATURE OF THE REACTOR AND EXTERNAL COOLING ESPECIALLY BY MEANS OF A CIRCULATION OF WATER, THE SAID CYCLE PRODUCING DIAMETRAL AND AXIAL DEFORMATIONS WHICH INTRODUCE A CLEARANCE BETWEEN THE SAID POWDER AND THE SAID INNER TUBE, THE EXTREMITIES OF THE SAID GUIDE TUBE BEING THEN SHAPED ESPECIALLY BY CUTTING-OFF THE FACING ON THE LATHE.
Claim 2
Dependent Claim
138 words
METHOD OF PREPARATION OF A COMPOSITE GUIDE TUBE WHICH IS DESIGNED FOR NUCLEAR REACTORS OF THE COOL PRESSURE TUBE TYPE AND TRHOUGH WHICH A COOLANT CIRCULATES, IN WHICH A HEAT-INSULATING REFRACTORY POWDER IS PLACED ON A RIGID INNER TUBE, THE SAID POWDER IS SURROUNDING BY A FLEXIBLE ENVELOPE TUBE AND THEN COMPRESSED TO A PREDETERMINED VALUE, THE COMPOSITE GUIDE TUBE ASSEMBLY WHICH IS THUS OBTAINED IS SUBJECTED TO AT LEAST ONE CYCLE OF INTERNAL HEATING AT A TEMPERATURE WHICH IS HIGHER THAN THE OPERATING TEMPERATURE OF THE REACTOR AND EXTERNAL COOLING ESPECIALLY BY MEANS OF A CIRCULATION OF WATER, THE SAID CYCLE PRODUCING DIAMETRAL AND AXIAL DEFORMATIONS WHICH INTRODUCE A CLEARANCE BETWEEN THE SAID POWDER AND THE SAID INNER TUBE, THE EXTREMITIES OF THE SAID GUIDE TUBE BEING THEN SHAPED ESPECIALLY BY CUTTING-OFF THE FACING ON THE LATHE.
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |