Patent US2972349A successfully refreshed from Google Patents.
US2341013A
Expired / Lapsed
US
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Thermosensitive control circuit
Assignee: AT&T Inc
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Filing: 1941-07-25
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Granted: 1944-02-08
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Expires: 1961-07-25
Abstract
No abstract record available.
Inventors
- 👤 Harold S Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:43
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/06; H04B3/08
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) | 1947-02-07 | 1947-08-09 | 1948-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-02-07 | 1951-08-09 | 1952-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-02-07 | 1955-08-09 | 1956-02-08 | $7700.00 | Window Closed / Lapsed |