US1051543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direction-finder for submarine signals.
Assignee: Individual
•
Filing: 1912-04-30
•
Granted: 1913-01-28
•
Expires: 1932-04-30
Abstract
No abstract record available.
Inventors
- 👤 Lucien Ira Blake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:08
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/72
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) | 1916-01-28 | 1916-07-29 | 1917-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1920-01-28 | 1920-07-29 | 1921-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1924-01-28 | 1924-07-29 | 1925-01-28 | $7700.00 | Window Closed / Lapsed |