Patent US2586827A successfully refreshed from Google Patents.
US2586827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directive radiating system
Assignee: Unisys Corp
•
Filing: 1945-03-31
•
Granted: 1952-02-26
•
Expires: 1965-03-31
Abstract
No abstract record available.
Inventors
- 👤 John E Karlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:13
CPC Classifications
H; H01; H01Q; H01Q25/00; H01Q25/002; H01Q3/00; H01Q3/02; H01Q3/08; H01Q3/10; H01Q3/12; H01Q3/16; H01Q3/18; H05; H05B; H05B3/00; H05B3/0095
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2156653A
Cited
US2287533A
Cited
US2370053A
Cited
US2419556A
Cited
US2422579A
Cited
US2412867A
Cited
US2429601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |