Patent US3441901A successfully refreshed from Google Patents.
US3441901A
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US
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System for measuring sound velocity in water as a function of depth
Assignee: United States Department of the Navy
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Filing: 1967-08-21
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Granted: 1969-04-29
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Expires: 1987-08-21
Abstract
No abstract record available.
Inventors
- 👤 John H Cawley
- 👤 Daniel Schiff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:36
CPC Classifications
G; G01; G01H; G01H5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |