US2689346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long range navigation system
Assignee: United States Department of the Navy
•
Filing: 1945-06-13
•
Granted: 1954-09-14
•
Expires: 1965-06-13
Abstract
No abstract record available.
Inventors
- 👤 John A Pierce
- 👤 Donald E Kerr
- 👤 Jabez C Street
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:17
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02; G01S1/08; G01S1/20; G01S1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2405238A
Cited
FR866695A
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US2403626A
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US2403600A
Cited
US2403429A
Cited
GB581602A
Cited
US2512923A
Cited
US2420516A
Cited
US2430570A
Cited
US2445361A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |