Patent US3176298A successfully refreshed from Google Patents.
US3176298A
Expired / Lapsed
US
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Attachment for antennas to reduce operating frequencies
Assignee: Individual
•
Filing: 1962-06-11
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Granted: 1965-03-30
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Expires: 1982-06-11
Abstract
No abstract record available.
Inventors
- 👤 Walter E Nettles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:57
CPC Classifications
H; H01; H01Q; H01Q5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2282292A
Cited
US2531231A
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US2719920A
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US2655599A
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US2967300A
Cited
US2976532A
Cited
US3064257A
Cited
US3089140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |