Patent US2789328A successfully refreshed from Google Patents.
US2789328A
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US
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Apparatus for casting of metals
Assignee: Kaiser Aluminum and Chemical Corp
•
Filing: 1954-11-19
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Granted: 1957-04-23
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Expires: 1974-11-19
Abstract
No abstract record available.
Inventors
- 👤 Robert W Ackerman
- 👤 Wilbur E Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:27
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/14; B22D11/04; B22D11/049
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1555626A
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US1943351A
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US2127515A
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US2264288A
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DE742180C
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FR917577A
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US2560639A
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US2708297A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |