US2645700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor of mixed nickel, manganese, and iron oxides
Assignee: AT&T Inc
•
Filing: 1949-08-27
•
Granted: 1953-07-14
•
Expires: 1969-08-27
Abstract
No abstract record available.
Inventors
- 👤 Francis J Morin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:18
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/04; H01C7/042; H01C7/043; H01C7/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A CONDUCTIVE DEVICE CONSISTING ESSENTIALLY OF A SINTERED BODY OF THE COMBINED OXIDES OF NICKEL, MANGANESE AND IRON HAVING A SPECIFIC RESISTANCE AND TEMPERATURE COEFFICIENT OF RESISTANCE DEPENDENT UPON THE ATOMIC RATIO OF THE CONSTITUENTS METALS, SAID ATOMIC RATIO FALLING BETWEEN THE LIMITS OF
Claim 2
Dependent Claim
44 words
A CONDUCTIVE DEVICE CONSISTING ESSENTIALLY OF A SINTERED BODY OF THE COMBINED OXIDES OF NICKEL, MANGANESE AND IRON HAVING A SPECIFIC RESISTANCE AND TEMPERATURE COEFFICIENT OF RESISTANCE DEPENDENT UPON THE ATOMIC RATIO OF THE CONSTITUENTS METALS, SAID ATOMIC RATIO FALLING BETWEEN THE LIMITS OF
References Cited (Backward Citations)
US2081894A
Cited
US2082102A
Cited
US2219365A
Cited
US2258646A
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US2330950A
Cited
US2274592A
Cited
US2348315A
Cited
US2326580A
Cited
US2445296A
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US2414793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |