US2579471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for directive device
Assignee: Farnsworth Research Corp
•
Filing: 1947-12-05
•
Granted: 1951-12-25
•
Expires: 1967-12-05
Abstract
No abstract record available.
Inventors
- 👤 Buckbee John Alan
- 👤 Falk Alfred Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:20
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/66; G01S7/00; G01S7/48; G01S7/497; G01S7/4972; G01S7/02; G01S7/40; G01S7/4004; G01S7/4026; G01S7/4034
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2448007A
Cited
US2420334A
Cited
US2446024A
Cited
US2417248A
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US2412632A
Cited
US2444171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |