US2860970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal alloy
Assignee: Sierra Metals Corp
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Filing: 1957-10-11
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Granted: 1958-11-18
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Expires: 1977-10-11
Abstract
No abstract record available.
Inventors
- 👤 Rudolf H Thielemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:00
CPC Classifications
C; C22; C22C; C22C27/00; C22C27/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
53 words
A METAL ALLOY WHICH COMPRISES, BY WEIGHT : 3 TO 2/ PERCENT OF CHROMIUM; 2 TO 8 PERCENT OF ALUMINUM; 3 TO 10 PERCENT VANADIUMF UP TO 10 PERCENT OF TUNGSTEN; UP TO 5 PERCENT OF IRON; AND THE BALANCE, ESSENTIALLY A METAL OF THE GROUP CONSISTING OF TANTALUM, COLUMBIUM, AND MIXTURES THEREOF.
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) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |