US2944386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for increasing the impulsion of a fluid, especially applicable as a lift or propulsion device
Assignee: Bertin Technologies SAS
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Filing: 1957-06-25
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Granted: 1960-07-12
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Expires: 1977-06-25
Abstract
No abstract record available.
Inventors
- 👤 Bertin Jean Henri
- 👤 Schmitt Henri Francois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:33
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/52; H03F1/54; B; B64; B64C; B64C23/00; B64C23/005; F; F02; F02K; F02K1/00; F02K1/28; F02K1/36
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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |