US2789773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibrating ball mill having baffle plate for preventing short circuiting of material through the mill
Assignee: Allis Chalmers Corp
•
Filing: 1954-12-09
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Granted: 1957-04-23
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Expires: 1974-12-09
Abstract
No abstract record available.
Inventors
- 👤 Robert B Stauber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:16
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE94462C
Cited
US511871A
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DE633699C
Cited
DE655779C
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US2117965A
Cited
GB518981A
Cited
US2507917A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |