US2486172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impulse testing apparatus
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1945-01-08
•
Granted: 1949-10-25
•
Expires: 1965-01-08
Abstract
No abstract record available.
Inventors
- 👤 Kessler Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:28
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1759837A
Cited
US1936947A
Cited
US1964526A
Cited
GB497147A
Cited
US2207513A
Cited
US2245683A
Cited
US2307237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-24 | 1953-04-25 | 1953-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-24 | 1957-04-25 | 1957-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-24 | 1961-04-25 | 1961-10-25 | $7700.00 | Window Closed / Lapsed |