US2633303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary grinding ball mill
Assignee: Union Machine Co
•
Filing: 1949-03-04
•
Granted: 1953-03-31
•
Expires: 1969-03-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward H Cumpston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:25
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/18; B02C17/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE233164C
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US569828A
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DE633699C
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US858930A
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US1449845A
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US1860383A
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US2014640A
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GB540816A
Cited
US2284548A
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CH231753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-30 | 1956-09-29 | 1957-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-30 | 1960-09-29 | 1961-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-30 | 1964-09-29 | 1965-03-31 | $7700.00 | Window Closed / Lapsed |