US3794532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spherodization of grain boundary precipitates
Assignee: United States Atomic Energy Commission
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Filing: 1972-03-14
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Granted: 1974-02-26
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Expires: 1992-03-14
Abstract
Abstract A METHOD FOR SPHEROIDIZING GRAIN BOUNDRY PRECIPITATES BY CYCLING THROUGH THE ALPHA-GAMMA PHASE TRANSFORMATION, WHEREIN BOTH THE DUCTILITY AND STRENGTH OF THE MATERIAL ARE INCREASED. THE INVENTIVE SPHEROIDIZATION PROCESS IS APPLICABLE TO THE BINARY SYSTEM, SUCH AS FE-TA. IN ADDITION IT HAS BEEN DISCOVERED THAT THE ADDITION OF SELECTED AMOUNTS OF CHROMIUM ON THE FE-TA BINARY SYSTEM (FETA-CR ALLOY) ENHANCED SPHEROIDAZATION AS WELL AS IMPROVED OXIDATION RESISTANCE, WHILE LOWERING THE HEAT TREATMENT TEMPERATURE.
Inventors
- 👤 R Jones
- 👤 E Parker
- 👤 V Zackay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:25
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/26; C21D1/32; C21D6/00; C21D6/002; C22; C22C; C22C38/00; C22C38/12
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |