US2806200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ambient temperature compensation of thermistors
Assignee: AT&T Inc
•
Filing: 1952-12-17
•
Granted: 1957-09-10
•
Expires: 1972-12-17
Abstract
No abstract record available.
Inventors
- 👤 Raymond W Ketchledge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:12
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB474522A
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US2163403A
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US2258128A
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US2269001A
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US2341013A
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US2379694A
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US2426589A
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US2496723A
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US2480201A
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US2554087A
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US2545985A
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US2587750A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |