US2746040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Annular element antenna systems
Assignee: RCA Corp
•
Filing: 1950-05-20
•
Granted: 1956-05-15
•
Expires: 1970-05-20
Abstract
No abstract record available.
Inventors
- 👤 Martin Charles Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:31
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/30; H01Q9/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US760463A
Cited
US767974A
Cited
GB176803A
Cited
GB194365A
Cited
US1595166A
Cited
GB248597A
Cited
US2180855A
Cited
US2665380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |