US2560972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Horizontal axis ball mill with peripheral screening and lifting bays
Assignee: Individual
•
Filing: 1947-12-09
•
Granted: 1951-07-17
•
Expires: 1967-12-09
Abstract
No abstract record available.
Inventors
- 👤 John B Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:59
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US639406A
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GB190202385A
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US847436A
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US925288A
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US1113120A
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US1172626A
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US1370699A
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DE498328C
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FR710275A
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DE565994C
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US2268661A
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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) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |