Patent US2957764A successfully refreshed from Google Patents.
US2957764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Columbium-tantalum binary alloys
Assignee: Fansteel Inc
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Filing: 1957-07-25
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Granted: 1960-10-25
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Expires: 1977-07-25
Abstract
No abstract record available.
Inventors
- 👤 Arthur B Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:45
CPC Classifications
C; C22; C22C; C22C27/00; C22C27/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
AN ALLOY OR INTERMETALLIC COMPOSITION CONSISTING ESSENTIALLY OF COLUMBIUM AND TANTALUM, THE TATALUM BEING PRESENT IN AN AMOUNT IN THE RANGE OF FROM ABOUT 17 PERCENT BY WEIGHT TO ABOUT 74.40 PERCENT BY WEIGHT AND THE BALANCE BEING SUBSTANTIALLY ALL COLUMBIUM AND HAVING A GREATER RESISTANCE TO OXIDATION AT ELEVATED TEMPERATURES THAN SUBSTANTIALLY PURE COLUMBIUM.
Claim 2
Dependent Claim
55 words
AN ALLOY OR INTERMETALLIC COMPOSITION CONSISTING ESSENTIALLY OF COLUMBIUM AND TANTALUM, THE TATALUM BEING PRESENT IN AN AMOUNT IN THE RANGE OF FROM ABOUT 17 PERCENT BY WEIGHT TO ABOUT 74.40 PERCENT BY WEIGHT AND THE BALANCE BEING SUBSTANTIALLY ALL COLUMBIUM AND HAVING A GREATER RESISTANCE TO OXIDATION AT ELEVATED TEMPERATURES THAN SUBSTANTIALLY PURE COLUMBIUM.
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) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |