US2479465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device
Assignee: AT&T Inc
•
Filing: 1947-01-04
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Granted: 1949-08-16
•
Expires: 1967-01-04
Abstract
No abstract record available.
Inventors
- 👤 Gunther A Boeck
- 👤 Edson J Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:00
CPC Classifications
H; H03; H03J; H03J1/00; H03J1/06; H03J1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-15 | 1953-02-14 | 1953-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-15 | 1957-02-14 | 1957-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-15 | 1961-02-14 | 1961-08-16 | $7700.00 | Window Closed / Lapsed |