Patent US3448752A successfully refreshed from Google Patents.
US3448752A
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US
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Fluid oscillator having variable volume feedback loops
Assignee: United States Department of the Navy
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Filing: 1967-04-18
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Granted: 1969-06-10
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Expires: 1987-04-18
Abstract
No abstract record available.
Inventors
- 👤 William C O'neill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:43
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/08; F15C1/22; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/218; Y10T137/2185; Y10T137/2229; Y10T137/2234; Y10T137/224
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) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |