US2473409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable compound resistor
Assignee: Submarine Signal Co
•
Filing: 1945-04-10
•
Granted: 1949-06-14
•
Expires: 1965-04-10
Abstract
No abstract record available.
Inventors
- 👤 John T Beechlyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:54
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/16; H01C10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1647331A
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US1480953A
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US1592193A
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US1654867A
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US1541961A
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US2176090A
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US2277883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |