US2858773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency responsive control device
Assignee: Individual
•
Filing: 1954-09-08
•
Granted: 1958-11-04
•
Expires: 1974-09-08
Abstract
No abstract record available.
Inventors
- 👤 Jr George C Eldridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:50
CPC Classifications
A; A63; A63H; A63H19/00; A63H19/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2073443A
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US1778465A
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GB326769A
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US1827860A
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US2048067A
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US2166359A
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US2170206A
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US2622542A
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US2630482A
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US2631193A
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US2685844A
Cited
US2592721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |