US3556870A
Expired / Lapsed
US
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Method of preoxidizing nuclear reactor components of zirconium alloys
Assignee: Siemens AG
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Filing: 1967-09-27
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Granted: 1971-01-19
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Expires: 1987-09-27
Abstract
Abstract DESCRIBED IS A METHOD OF PREOXIDATION OF NUCLEAR REACFOR COMPONENTS OF ZIRCONIUM ALLOYS, USING WATER OR WATER VAPOR. THE PROCESS CHARACTERIZED BY A MULTISTEP TREATMENT WHEREBY THE USUAL PREOXIDATION IN WATER VAPOR OF 400* C. IS PRECEDED BY TREATMENT IN WATER OR VAPOR, AT TEMPERATURES BETWEEN 200-350*C. AND PREFERABLY 250-300* C. OVER A PERIOD OF 1-4 DAYS.
Inventors
- 👤 Werner Debray
- 👤 Ullrich Mattern
- 👤 Lothar Stieding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:13
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/02; G21C3/04; G21C3/06; C; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/10; C23C8/16; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10S; Y10S376/00; Y10S376/90
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |