Patent US2997756A successfully refreshed from Google Patents.
US2997756A
Expired / Lapsed
US
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Method and apparatus for casting ingots
Assignee: Griffin Wheel Co Inc
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Filing: 1956-07-17
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Granted: 1961-08-29
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Expires: 1976-07-17
Abstract
No abstract record available.
Inventors
- 👤 Charles F Strom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:03
CPC Classifications
B; B22; B22D; B22D18/00; B22D18/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA455258A
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GB190427619A
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US969539A
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US1150318A
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US1029565A
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US1153220A
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US1473246A
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US1703739A
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US1910008A
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US2401491A
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US2625719A
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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) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |