US2474380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for modifying electrical signals
Assignee: Simmon Brothers Inc
•
Filing: 1947-12-12
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Granted: 1949-06-28
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Expires: 1967-12-12
Abstract
No abstract record available.
Inventors
- 👤 Simmon Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:43
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G06; G06F; G06F3/00; G06F3/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-27 | 1952-12-27 | 1953-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-27 | 1956-12-27 | 1957-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-27 | 1960-12-27 | 1961-06-28 | $7700.00 | Window Closed / Lapsed |