Patent FR2456506A1 successfully refreshed from Google Patents.
US2742611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic indicator for testing equipment
Assignee: AT&T Inc
•
Filing: 1951-06-13
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Granted: 1956-04-17
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Expires: 1971-06-13
Abstract
No abstract record available.
Inventors
- 👤 Maximilian J Antos
- 👤 Angelis George R De
- 👤 Edmund H Towle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:17
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/12; G01R31/18; G01R31/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2584680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |