US3297438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature strength columbium base alloys
Assignee: RTX Corp
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Filing: 1964-04-06
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Granted: 1967-01-10
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Expires: 1984-04-06
Abstract
No abstract record available.
Inventors
- 👤 Elihu F Bradley
- 👤 Robert I Jaffee
- 👤 Dean N Williams
- 👤 Edwin S Bartlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:04
CPC Classifications
C; C22; C22C; C22C27/00; C22C27/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
43 words
A DUCTILE COLUMBIUM-BASE ALLOY HAVING GOOD STRESSRUPTURE STRENGTH AT HIGH TEMPERATURES AND CONSISTING ESSENTIALLY OF ABOUT 20% BY WEIGHT OF TANTALUM, ABOUT 10% BY WEIGHT OF TUNGSTEN, ABOUT 5% BY WEIGHT OF MOLYBDENUM, ABOUT 5% BY WEIGHT OF HAFNIUM, AND BALANCE ESSENTIALLY COLUMBIUM.
References Cited (Backward Citations)
US1588518A
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FR1190580A
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GB803855A
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US2883282A
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US2907654A
Cited
US2957764A
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US3027255A
Cited
US3188205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |