US2433738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for reclaiming spent foundry sand
Assignee: Individual
•
Filing: 1944-04-06
•
Granted: 1947-12-30
•
Expires: 1964-04-06
Abstract
No abstract record available.
Inventors
- 👤 Alfred C Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:41
CPC Classifications
B; B22; B22C; B22C5/00; B22C5/04; Y; Y10; Y10S; Y10S241/00; Y10S241/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1768465A
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US1337333A
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US1551738A
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US1529256A
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US1713869A
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US2376177A
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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) | 1950-12-29 | 1951-06-30 | 1951-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-29 | 1955-06-30 | 1955-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-29 | 1959-06-30 | 1959-12-30 | $7700.00 | Window Closed / Lapsed |