US2981946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna feed system
Assignee: RCA Corp
•
Filing: 1947-09-30
•
Granted: 1961-04-25
•
Expires: 1967-09-30
Abstract
No abstract record available.
Inventors
- 👤 Nathaniel I Korman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:08
CPC Classifications
H; H01; H01Q; H01Q25/00; H01Q25/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2206923A
Cited
US2423072A
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US2407068A
Cited
US2403302A
Cited
US2436408A
Cited
US2412315A
Cited
US2434253A
Cited
US2441574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |