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US3428068A
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Turbulence amplifier
Assignee: HOWIE CORP
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Filing: 1967-02-06
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Granted: 1969-02-18
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Expires: 1987-02-06
Abstract
No abstract record available.
Inventors
- 👤 Kenneth Howie Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:52
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/18; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/218; Y10T137/2273
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) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |