US3746581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zone annealing in dispersion strengthened materials
Assignee: NAT NICKEL CO Inc
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Filing: 1972-01-31
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Granted: 1973-07-17
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Expires: 1992-01-31
Abstract
Abstract A MTHOD IS PROVIDED FOR PRODUCING A HOT WORKED HIGH TEMPERATURE HEAT RESISTANT DISPERSION-STRENGTHENED SUPERALLOY, CHARACTERIZED BY A METALLOGRAPHIC STRUCTURE CONSISTING ESSENTIALLY OF LARGE COARSE GRAINS HAVING A PREFERRED ORIENTATION RELATIVE TO THE AXIS OF WORKING, THE METHOD COMPRISING SUBJECTING A DISPERSION-STRENGTHENED ALLOY, E.G., SUPERALLOY, THE ZONE ANNEALING AT AN ELEVATED GERMINATIVE GRAIN GROWTH TEMPERATURE TO FORM COARSE GRAINS DISPOSED IN THE WORKING DIRECTION OF THE ALLOY AND TO ACHIEVE IMPROVED PROPERTIES.
Inventors
- 👤 R Cairns
- 👤 J Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:50
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/052; C22C32/00; C22C32/001; C22C32/0015; C22C32/0026; C22F; C22F1/00; C22F1/10
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |