US2923813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna systems
Assignee: Individual
•
Filing: 1955-02-11
•
Granted: 1960-02-02
•
Expires: 1975-02-11
Abstract
No abstract record available.
Inventors
- 👤 Ross A Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:05
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/1271; B; B60; B60J; B60J1/00; B60J1/02; H04; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/08; H04B7/0802
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1762974A
Cited
US1959281A
Cited
US2070159A
Cited
US2632851A
Cited
US2481978A
Cited
US2601510A
Cited
FR1012833A
Cited
US2575471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |