US2470023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modulating system
Assignee: Farnsworth Research Corp
•
Filing: 1944-11-01
•
Granted: 1949-05-10
•
Expires: 1964-11-01
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Ferguson
- 👤 Jr Albert T Mayle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:15
CPC Classifications
H; H03; H03C; H03C7/00; H03C7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1650934A
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US1844941A
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GB370967A
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US2223058A
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US2243829A
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US2270777A
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US2241976A
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US2348585A
Cited
US2372701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |