US2436415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical testing apparatus
Assignee: AT&T Inc
•
Filing: 1943-10-19
•
Granted: 1948-02-24
•
Expires: 1963-10-19
Abstract
No abstract record available.
Inventors
- 👤 Arnold Edwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:12
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/327; G01R31/3277; G01R31/3278
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1305865A
Cited
US1506761A
Cited
US1251750A
Cited
US1346431A
Cited
US2340837A
Cited
US2347943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-23 | 1951-08-25 | 1952-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-23 | 1955-08-25 | 1956-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-23 | 1959-08-25 | 1960-02-24 | $7700.00 | Window Closed / Lapsed |