Patent US2965877A successfully refreshed from Google Patents.
US2965877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitive-type line hydrophone
Assignee: Individual
•
Filing: 1957-06-10
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Granted: 1960-12-20
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Expires: 1977-06-10
Abstract
No abstract record available.
Inventors
- 👤 James H Stein
- 👤 John D Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:16
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/16; G01V1/20; G01V1/201; G01V1/208; G01H; G01H11/00; G01H11/06; G01L; G01L9/00; G01L9/0001; G01L9/0005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1471547A
Cited
US1584613A
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GB265000A
Cited
US1966237A
Cited
GB664775A
Cited
US2571988A
Cited
US2649579A
Cited
US2755796A
Cited
US2768368A
Cited
US2740032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |