US2603686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical testing apparatus
Assignee: AT&T Inc
•
Filing: 1948-10-19
•
Granted: 1952-07-15
•
Expires: 1968-10-19
Abstract
No abstract record available.
Inventors
- 👤 Stanley M Lloyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:37
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1793970A
Cited
US1990085A
Cited
US2094351A
Cited
US2071607A
Cited
US2373079A
Cited
US2393717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |