US2463756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of electrical apparatus
Assignee: AT&T Inc
•
Filing: 1944-03-22
•
Granted: 1949-03-08
•
Expires: 1964-03-22
Abstract
No abstract record available.
Inventors
- 👤 Egerton Lawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:34
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/22; H01G4/221; H01G4/222; H01G13/00; H01G13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2026316A
Cited
US2058846A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-07 | 1952-09-06 | 1953-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-07 | 1956-09-06 | 1957-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-07 | 1960-09-06 | 1961-03-08 | $7700.00 | Window Closed / Lapsed |