US2907654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature tantalum-columbium base alloys
Assignee: Sierra Metals Corp
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Filing: 1957-07-01
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Granted: 1959-10-06
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Expires: 1977-07-01
Abstract
No abstract record available.
Inventors
- 👤 Rudolf H Thielemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:10
CPC Classifications
C; C22; C22C; C22C27/00; C22C27/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A METAL ALLOY WHICH COMPRISES, BY WEIGHT 5 PERCENT TO 20 PERCENT CHROMIUM; 2 PERCENT TO 25 PERCENT TUNGSTEN, AND THE BALANCE, ESSENTIALLY A MIXTURE OF TANTALUM AND COLUMBIUM, ATHE AMOUNT OIF TANATALUM IN THE MIXATURE OF TANTALUM AND COLUMBIUM BEING FROM 10 PERCENT TO 95 PERCENT OF THE MIXTURE, THE BALANCE OF THE MIXTURE BEING ESSENTIALLY COLUMBIUM.
Claim 2
Dependent Claim
58 words
A METAL ALLOY WHICH COMPRISES, BY WEIGHT 5 PERCENT TO 20 PERCENT CHROMIUM; 2 PERCENT TO 25 PERCENT TUNGSTEN, AND THE BALANCE, ESSENTIALLY A MIXTURE OF TANTALUM AND COLUMBIUM, ATHE AMOUNT OIF TANATALUM IN THE MIXATURE OF TANTALUM AND COLUMBIUM BEING FROM 10 PERCENT TO 95 PERCENT OF THE MIXTURE, THE BALANCE OF THE MIXTURE BEING ESSENTIALLY COLUMBIUM.
References Cited (Backward Citations)
US1588518A
Cited
US1742417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |