Patent US178821A successfully refreshed from Google Patents.
US2821710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television antenna
Assignee: GEORGE H FERRIMAN
•
Filing: 1954-08-06
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Granted: 1958-01-28
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Expires: 1974-08-06
Abstract
No abstract record available.
Inventors
- 👤 Phillip D Hale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:30
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/16; H01Q9/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB451213A
Cited
US2614220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |