US941565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for determining positions of vessels.
Assignee: NATIONAL ELECTRIC SIGNALING Co
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Filing: 1907-03-18
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Granted: 1909-11-30
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Expires: 1927-03-18
Abstract
No abstract record available.
Inventors
- 👤 Reginald A Fessenden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:47
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
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) | 1912-11-29 | 1913-05-31 | 1913-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-11-29 | 1917-05-31 | 1917-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-11-29 | 1921-05-31 | 1921-11-30 | $7700.00 | Window Closed / Lapsed |