Patent US2698977A successfully refreshed from Google Patents.
US2698977A
Expired / Lapsed
US
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Sand conditioning machine
Assignee: Wheelabrator Corp
•
Filing: 1950-11-24
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Granted: 1955-01-11
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Expires: 1970-11-24
Abstract
No abstract record available.
Inventors
- 👤 Zachary H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:11
CPC Classifications
B; B22; B22C; B22C5/00; B22C5/04; B22C5/0486; B22C5/049; B22C5/0495
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US404333A
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US1033378A
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US1499426A
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US1685139A
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US662411A
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US1534331A
Cited
DE533279C
Cited
US2164799A
Cited
US2200623A
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US2345457A
Cited
US2567472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-10 | 1958-07-12 | 1959-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-10 | 1962-07-12 | 1963-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-10 | 1966-07-12 | 1967-01-11 | $7700.00 | Window Closed / Lapsed |