US2649581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single scope two-coordinate radar system
Assignee: Gilfillan Bros Inc
•
Filing: 1947-09-29
•
Granted: 1953-08-18
•
Expires: 1967-09-29
Abstract
No abstract record available.
Inventors
- 👤 Homer G Tasker
- 👤 Alvin L Hiebert
- 👤 Alwyn L Kelsey
- 👤 William E Osborne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:24
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G01S7/06; G01S7/22; G01S1/00; G01S1/02; G01S7/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2189549A
Cited
US2405238A
Cited
US2405231A
Cited
US2416088A
Cited
US2430292A
Cited
US2422361A
Cited
US2426979A
Cited
US2540121A
Cited
US2422204A
Cited
US2421747A
Cited
US2422295A
Cited
US2470939A
Cited
US2408050A
Cited
US2566332A
Cited
US2480208A
Cited
US2488136A
Cited
US2418143A
Cited
US2471264A
Cited
US2463529A
Cited
US2459481A
Cited
US2514617A
Cited
US2570251A
Cited
US2480068A
Cited
US2483644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |