US3689324A
Expired / Lapsed
US
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Process for obtaining preferred orientation in zirconium and its alloy
Assignee: GEORGE W WIENER
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Filing: 1968-09-27
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Granted: 1972-09-05
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Expires: 1988-09-27
Abstract
Abstract A PROCESS IS DESCRIBED IN WHICH ZIRCONIUM AND ITS ALLOYS ARE SUBJECTED TO A BETA PHASE HEAT TREATMENT AND DURING SAID HEAT TREATMENT A SURFACE ACTIVE AGENT IS ADMITTED TO THE HEAT TREATING ENVIRONMENT. THEREAFTER, THE METAL OR ALLOY IS COOLED TO A TEMPERATURE BELOW THE ALLOTROPIC TRANSFORMATION TEMPERATURE. THE METAL OR ALLOY THUS TREATED IS CHARACTERIZED BY A PREFERRED ORENTATION WHICH INCLUDES A HIGH VOLUME PROPORTION OF THE GRAINS EXHIBITING THE BASAL PLANE (0002) ORIENTED TO WITHIN 15* OF THE SURFAE OF THE MATERIAL.
Inventors
- 👤 George W Wiener
- 👤 William T Reynolds
- 👤 Robert G Aspden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:05
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/16; C22F1/18; C22F1/186; Y; Y10; Y10S; Y10S376/00; Y10S376/90; Y10T; Y10T428/00; Y10T428/12; Y10T428/12465
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |