US3458855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater acoustic generator with variable resonant frequency
Assignee: United States Department of the Navy
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Filing: 1968-04-23
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Granted: 1969-07-29
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Expires: 1988-04-23
Abstract
No abstract record available.
Inventors
- 👤 Albert E Wallen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:17
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/02; G10K11/04; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0603
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3017608A
Cited
US2802196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |