US2774967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced doublet antenna of small dimension
Assignee: International Standard Electric Corp
•
Filing: 1949-11-19
•
Granted: 1956-12-18
•
Expires: 1969-11-19
Abstract
No abstract record available.
Inventors
- 👤 Frank J Lundburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:04
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/12; H01Q3/14; H01P; H01P7/00; H01P7/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2044413A
Cited
US2415094A
Cited
US2398096A
Cited
US2359620A
Cited
US2465416A
Cited
US2418084A
Cited
US2539680A
Cited
US2532919A
Cited
US2572041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |