US2663869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical antenna scanning system
Assignee: Individual
•
Filing: 1950-07-07
•
Granted: 1953-12-22
•
Expires: 1970-07-07
Abstract
No abstract record available.
Inventors
- 👤 Adcock Mack Donald
- 👤 Arthur E Marston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:59
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/26; H01Q3/30; H01Q3/32; G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/42; G01S13/422; H01Q11/00; H01Q11/02; H01Q11/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |