US2656596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tungsten-chromium-alumina metal ceramics
Assignee: Union Carbide Corp
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Filing: 1949-05-17
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Granted: 1953-10-27
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Expires: 1969-05-17
Abstract
No abstract record available.
Inventors
- 👤 Louis A Conant
- 👤 Daniel M Gillies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:08
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/001; C22C32/0015; C22C32/0031
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A METAL CERAMIC PRODUCT CHARACTERIZED BY ITS OXIDATION RESISTANCE AND STRENGTH AT ELEVATED TEMPERATURES COMPOSED OF A STRONGLY COHESIVE, SINTERED MASS OF INTIMATELY DISPERSED MINUTE PARTICLES OF ALUMINA AND METAL, SAID ALUMINA BEING PRESENT IN SAID MASS IN AN AMOUNT BETWEEN 5 VOLUME PERCENT AND 50 VOLUME PERCENT, SAID METAL BEING PRESENT IN SAID MASS IN AN AMOUNT BETWEEN 95 VOLUME PERCENT AND 50 VOLUME PERCENT, SAID METAL BEING COMPOSED BY WEIGHT OF BETWEEN 20% AND 45% CHROMIUM AND BETWEEN 80% AND 55% TUNGSTEN.
Claim 2
Dependent Claim
84 words
A METAL CERAMIC PRODUCT CHARACTERIZED BY ITS OXIDATION RESISTANCE AND STRENGTH AT ELEVATED TEMPERATURES COMPOSED OF A STRONGLY COHESIVE, SINTERED MASS OF INTIMATELY DISPERSED MINUTE PARTICLES OF ALUMINA AND METAL, SAID ALUMINA BEING PRESENT IN SAID MASS IN AN AMOUNT BETWEEN 5 VOLUME PERCENT AND 50 VOLUME PERCENT, SAID METAL BEING PRESENT IN SAID MASS IN AN AMOUNT BETWEEN 95 VOLUME PERCENT AND 50 VOLUME PERCENT, SAID METAL BEING COMPOSED BY WEIGHT OF BETWEEN 20% AND 45% CHROMIUM AND BETWEEN 80% AND 55% TUNGSTEN.
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) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |