US2624808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signaling switch device
Assignee: National Pneumatic Co Inc
•
Filing: 1949-03-30
•
Granted: 1953-01-06
•
Expires: 1969-03-30
Abstract
No abstract record available.
Inventors
- 👤 Eric E Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:18
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/18; H01; H01H; H01H13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US335604A
Cited
US845236A
Cited
US1117646A
Cited
US1383527A
Cited
US1915985A
Cited
US2119778A
Cited
US2191993A
Cited
US2245835A
Cited
US2420768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |