US3439759A
Expired / Lapsed
US
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Method and apparatus for obtaining a constant predetermined flow of liquid,especially molten metal
Assignee: Institut de Recherches de la Siderurgie Francaise IRSID
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Filing: 1966-12-12
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Granted: 1969-04-22
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Expires: 1986-12-12
Abstract
No abstract record available.
Inventors
- 👤 Jean Rouanet
- 👤 Aristide Berthet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:49
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/16; B22D11/18; B22D11/181; B22D11/183; G; G05; G05D; G05D7/00; G05D7/06; G05D7/0617; G05D7/0629; G05D7/0635; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7339; Y10T137/7355
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) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |