US2695357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency conversion apparatus
Assignee: RCA Corp
•
Filing: 1951-04-19
•
Granted: 1954-11-23
•
Expires: 1971-04-19
Abstract
No abstract record available.
Inventors
- 👤 Hugh L Donley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:26
CPC Classifications
H; H03; H03D; H03D7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1732710A
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US1719484A
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US1794365A
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US2402518A
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US2387472A
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US2461307A
Cited
US2539268A
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US2501488A
Cited
GB641373A
Cited
US2571019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |