US2491466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling the feed to a mill in a grinding circuit
Assignee: Mine and Smelter Supply Co
•
Filing: 1943-10-12
•
Granted: 1949-12-20
•
Expires: 1963-10-12
Abstract
No abstract record available.
Inventors
- 👤 James A Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:08
CPC Classifications
B; B23; B23Q; B23Q15/00; B23Q15/007; B23Q15/12; B02; B02C; B02C25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1619807A
Cited
DE540290C
Cited
US2038917A
Cited
US2136907A
Cited
US2156736A
Cited
US2240822A
Cited
US2381351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |