Patent US2839799A successfully refreshed from Google Patents.
US2839799A
Expired / Lapsed
US
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Sand blowing apparatus for making molds
Assignee: Archer Daniels Midland Co
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Filing: 1955-02-14
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Granted: 1958-06-24
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Expires: 1975-02-14
Abstract
No abstract record available.
Inventors
- 👤 Heinrich J B Herbruggen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:52
CPC Classifications
B; B22; B22C; B22C15/00; B22C15/23; B22C15/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2191451A
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US778329A
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US1803406A
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US1931185A
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US2349219A
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US2656575A
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US2785447A
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US2757424A
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US2791013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |