US2937456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radar practice apparatus for training personnel
Assignee: AT&T Inc
•
Filing: 1944-02-03
•
Granted: 1960-05-24
•
Expires: 1964-02-03
Abstract
No abstract record available.
Inventors
- 👤 John H Bollman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:40
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/40; G09; G09B; G09B9/00; G09B9/54; G01S7/4052; G01S7/406; G01S7/4065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1939706A
Cited
US2321799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |