Patent US2521753A successfully refreshed from Google Patents.
US2521753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid cooled nonferrous permanent mold casting unit
Assignee: Individual
•
Filing: 1948-04-16
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Granted: 1950-09-12
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Expires: 1968-04-16
Abstract
No abstract record available.
Inventors
- 👤 Clarence R Shook
- 👤 Philip B Neisser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:04
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/06; B22C9/065; B22D; B22D21/00; B22D21/02; B22D21/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US912228A
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US928246A
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US1021543A
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US1031585A
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US1643780A
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US1894982A
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US1909773A
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US1917872A
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US2030482A
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US2134827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |