US2962452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic semi-conductor compositions
Assignee: Motors Liquidation Co
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Filing: 1957-06-12
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Granted: 1960-11-29
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Expires: 1977-06-12
Abstract
No abstract record available.
Inventors
- 👤 Counts William Edward
- 👤 Smith Robert Worth
- 👤 Schwartzwalder Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:35
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/478; H; H01; H01B; H01B1/00; H01B1/06; H01B1/08; H01C; H01C7/00; H01C7/001
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
127 words
A CERAMIC COMPOSITION FORMED FROM A BATCH CONSISTING OF 15 TO 60 PARTS OF TIO2, 0 TO 50 PARTS OF SNO2, UP TO 15 PARTS OF A MATERIAL SELECTED FROM THE CLASS CONSISTING OF TA2O5, NB2O5 AND V2O5, 20 TO 40 PARTS OF A MATERIAL SELECTED FROM THE CLASS CONSISTNG OF AL12O3, MAGNESIA, MULLITE, ZIRCON AND CHROME OXIDE, AND UP TO 10 PARTS OF A MATERIAL SELECTED FROM THE CLASS CONSISTING OF MOO3 AND WO3 AND MIXTURES THEREOF, AND TRACE IMPURITIES, SAID TA2O5, NB2O5 AND V2O5 BEING PRESENT IN AT LEAST SMALL BUT EFFECTIVE AMOUNTS TO REDUCE THE RESISTANCE TO THE DESIRED VALUE AND SAID MOO3 WO3 BEING PRESENT IN AT LEAST SMALL BUT EFFECTIVE AMOUNTS TO REDUCE THE VOLTAGE CO-EFFICIENT OF RESISTIVITY TO THE DESIRED VALUE.
References Cited (Backward Citations)
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US2331444A
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GB574577A
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US2616859A
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US2533140A
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US2729757A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |