US2541107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-clearance antenna
Assignee: Farnsworth Research Corp
•
Filing: 1947-04-12
•
Granted: 1951-02-13
•
Expires: 1967-04-12
Abstract
No abstract record available.
Inventors
- 👤 Paul J Selgin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:01
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/16; H01Q9/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2031103A
Cited
US2175252A
Cited
US2272608A
Cited
US2344171A
Cited
US2401601A
Cited
US2368663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |