US2219844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directional antenna control
Assignee: Individual
•
Filing: 1939-12-09
•
Granted: 1940-10-29
•
Expires: 1959-12-09
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Lotter
- 👤 Victor W Lotter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:53
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/08; H01Q1/10; H01Q1/103; H01Q3/00; H01Q3/02; H01Q3/04; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/18304; Y10T74/18312; Y10T74/18568; Y10T74/18576; Y10T74/18648; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19702; Y10T74/19805; Y10T74/20; Y10T74/20396; Y10T74/20474; Y10T74/20492; Y10T74/20504
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-10-29 | 1944-04-29 | 1944-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-29 | 1948-04-29 | 1948-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-29 | 1952-04-29 | 1952-10-29 | $7700.00 | Window Closed / Lapsed |