US2464834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for determining depth and current direction
Assignee: Individual
•
Filing: 1945-03-16
•
Granted: 1949-03-22
•
Expires: 1965-03-16
Abstract
No abstract record available.
Inventors
- 👤 Lawrence H Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:04
CPC Classifications
B; B63; B63B; B63B49/00; B63B22/00; B63B22/003; B63B22/04; B63B22/08; B63B22/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2154376A
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US2252572A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-21 | 1952-09-20 | 1953-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-21 | 1956-09-20 | 1957-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-21 | 1960-09-20 | 1961-03-22 | $7700.00 | Window Closed / Lapsed |