US3275572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory composition and electrical resistance made therefrom
Assignee: Individual
•
Filing: 1961-10-11
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Granted: 1966-09-27
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Expires: 1981-10-11
Abstract
No abstract record available.
Inventors
- 👤 Ruben Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:54
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/58085; C04B35/58092; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; H; H01; H01B; H01B1/00; H05; H05B; H05B3/00; H05B3/10; H05B3/12; H05B3/14; H05B3/148; H05B2203/00; H05B2203/018
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
120 words
AN ELECTRICALLY CONDUCTING OXIDATION-RESISTANT PRESSED AND SINTERED REFRACTORY COMPOSITION RESISTANT TO OXIDATION AT HIGH TEMPERATURES CHARACTERIZED BY A STABLE ELECTRICAL RESISTANCE AND BY A TEMPERATURE COEFFICIENT OF RESISTANCE WHICH IS ADJUSTABLE BETWEEN POSITIVE AND NEGATIVE VALUES BY ADJUSTING THE PROPORTION OF ITS CONSTITUENTS, SAID COMPOSITION CONSISTING ESSENTIALLY OF 2% TO 25% BY WEIGHT OF VANADIUM PENTOXIDE, 1% TO 20% BY WEIGHT OF STANNOUS OXIDE, AND THE BALANCE MOLYBDENUM DISILICIDE, AND SAID COMPOSITION BEING THE REACTION PRODUCT OF HEATING THE MIXTURE OF THE COMPACTED CONSTITUENT POWDERS TO A TEMPERATURE BETWEEN ABOUT 1000* C. AND ABOVE 1200* C. FOR A PERIOD SUFFICIENT TO CAUSE EXOTHERMIC REACTION OF THE SAID CONSTITUENT POWDERS BUT INSUFFFICIENT TO CAUSE LOSS OF STANNOUS OXIDE DUE TO VOLATIZATION.
References Cited (Backward Citations)
US2419537A
Cited
US2717946A
Cited
DE1035739B
Cited
DE1082333B
Cited
US2955145A
Cited
US3006865A
Cited
US3023390A
Cited
US2998394A
Cited
US3027331A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |