US3664801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for developing high fluid pressure
Assignee: Government of France
•
Filing: 1970-05-18
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Granted: 1972-05-23
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Expires: 1990-05-18
Abstract
Abstract A PRESSURE DEVELOPING APPARATUS COMPRISES A CASING HAVING FIRST AND SECOND INTERCOMMUNICATING CHAMBERS EXTENDING AT RIGHT ANGLES TO ONE ANOTHER AND FILLED WITH A LIQUID. ONE CHAMBER CONTAINS A SLIDABLE PISTON THEREIN ADAPTED FOR BEING EXTERNALLY ACTED ON TO PRESSURIZE THE LIQUID IN THE CHAMBERS, AND THE OTHER CHAMBER CONTAINS THE MATERIAL TO BE PRESSURIZED. THE PISTON HAS A LIQUID INLET AND A BORE LEADING TO THE FIRST CHAMBER, AND THE INLET IS CLOSABLE BY A VALVE WHICH IS SUBJECTED TO THE PRESSURE OF THE LIQUID.
Inventors
- 👤 Jean Martrier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:41
CPC Classifications
F; F15; F15B; F15B21/00; Y; Y10; Y10S; Y10S425/00; Y10S425/015; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |