US2571051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direction-finder system
Assignee: Individual
•
Filing: 1946-03-01
•
Granted: 1951-10-09
•
Expires: 1966-03-01
Abstract
No abstract record available.
Inventors
- 👤 Carlton A Mizen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:16
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/02; G01S3/04; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2151917A
Cited
US2234587A
Cited
GB543222A
Cited
US2403967A
Cited
US2408039A
Cited
US2407281A
Cited
US2406858A
Cited
US2409456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |