US3136039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tungsten alloy
Assignee: Westinghouse Electric Corp
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Filing: 1961-05-03
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Granted: 1964-06-09
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Expires: 1981-05-03
Abstract
No abstract record available.
Inventors
- 👤 George H Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:35
CPC Classifications
C; C22; C22C; C22C27/00; C22C27/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A SINTERED TUNGSTEN-TANTALUM ALLOY INCLUDING CARBON AND HAVING HIGH-STRENGTH CHARACTERISTICS AT HIGH TEMPERATURES, SAID ALLOY CONTAINING TUNGSTEN IN AMOUNT OF FROM ABOUT 99.9% TO 98% BY WEIGHT, REMAINING ELEMENTS IN SAID ALLOY CONSISTING ESSENTIALLY OF TANTALUM AND CARBON, AND THE ATOM RATIO OF CARBON TO TANTALUM IN SAID ALLOY BEING FROM 0.2 TO 0.6.
Claim 2
Dependent Claim
54 words
A SINTERED TUNGSTEN-TANTALUM ALLOY INCLUDING CARBON AND HAVING HIGH-STRENGTH CHARACTERISTICS AT HIGH TEMPERATURES, SAID ALLOY CONTAINING TUNGSTEN IN AMOUNT OF FROM ABOUT 99.9% TO 98% BY WEIGHT, REMAINING ELEMENTS IN SAID ALLOY CONSISTING ESSENTIALLY OF TANTALUM AND CARBON, AND THE ATOM RATIO OF CARBON TO TANTALUM IN SAID ALLOY BEING FROM 0.2 TO 0.6.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |