Patent US2298192A successfully refreshed from Google Patents.
US2298192A
Expired / Lapsed
US
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Thermistor circuit
Assignee: AT&T Inc
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Filing: 1941-12-26
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Granted: 1942-10-06
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Expires: 1961-12-26
Abstract
No abstract record available.
Inventors
- 👤 John H Bollman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:46
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/10; H04B3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-10-05 | 1946-04-06 | 1946-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-10-05 | 1950-04-06 | 1950-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-10-05 | 1954-04-06 | 1954-10-06 | $7700.00 | Window Closed / Lapsed |