Patent US2942260A successfully refreshed from Google Patents.
US2942260A
Expired / Lapsed
US
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Circularly polarized wave apparatus
Assignee: Individual
•
Filing: 1955-07-01
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Granted: 1960-06-21
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Expires: 1975-07-01
Abstract
No abstract record available.
Inventors
- 👤 Philip S Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:49
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/165; H01P1/17; H01P1/173
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2531454A
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US2425336A
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US2530818A
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US2643338A
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US2702858A
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US2611087A
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US2645769A
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US2750588A
Cited
US2694778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |