US2838848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tactical training device for simulating radar displays
Assignee: Individual
•
Filing: 1953-01-27
•
Granted: 1958-06-17
•
Expires: 1973-01-27
Abstract
No abstract record available.
Inventors
- 👤 Ralph H Bergstad
- 👤 Donald D Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:03
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/40; G01S7/4004; G01S7/4021
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2060670A
Cited
US1918206A
Cited
US1969852A
Cited
US2164297A
Cited
US2282045A
Cited
US2417446A
Cited
US2405591A
Cited
US2392142A
Cited
US2428627A
Cited
US2406751A
Cited
US2516069A
Cited
US2676243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |