US2516756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Meter protection circuit
Assignee: AT&T Inc
•
Filing: 1948-11-16
•
Granted: 1950-07-25
•
Expires: 1968-11-16
Abstract
No abstract record available.
Inventors
- 👤 Greer W Cowley
- 👤 Donald E Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:21
CPC Classifications
G; G01; G01R; G01R1/00; G01R1/36
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) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |