US4030538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for adjusting the quantity of molten metal used in pressure casting
Assignee: Groupement Activities Atomiques Advancees
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Filing: 1976-06-30
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Granted: 1977-06-21
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Expires: 1996-06-30
Abstract
Abstract A device for adjusting the quantity of molten metal used in pressure casting has a pump pumping molten metal up from a supply container to a pressure chamber and to a level-determining tank having an adjustable overflow. Hydrostatic pressure balances the levels in the level-determining tank and the pressure chamber so that adjusting the overflow also adjusts the level of metal in the pressure chamber.
Inventors
- 👤 Henri Carbonnel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:35
CPC Classifications
B; B22; B22D; B22D39/00; B22D39/003; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86236
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) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |