US2880989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for discharging molten metal
Assignee: Kaiser Aluminum and Chemical Corp
•
Filing: 1956-11-13
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Granted: 1959-04-07
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Expires: 1976-11-13
Abstract
No abstract record available.
Inventors
- 👤 William O Stauffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:47
CPC Classifications
F; F27; F27D; F27D3/00; F27D3/15; F27D3/1509
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1332298A
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GB190619616A
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US1154281A
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US1209326A
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US1265602A
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AT91619B
Cited
US2252760A
Cited
US2676011A
Cited
DE864325C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |