Patent US3051903A successfully refreshed from Google Patents.
US3051903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio antenna
Assignee: Individual
•
Filing: 1959-12-30
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Granted: 1962-08-28
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Expires: 1979-12-30
Abstract
No abstract record available.
Inventors
- 👤 Robert D Morrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:09
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/189; H03F3/19; H01; H01Q; H01Q7/00; H01Q7/06; H01Q7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1710085A
Cited
US2581348A
Cited
US2641704A
Cited
US2882527A
Cited
US2860313A
Cited
FR1109262A
Cited
US2882350A
Cited
US2882392A
Cited
US2895129A
Cited
US2955286A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |