US2950869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball mill grates
Assignee: Mine and Smelter Supply Co
•
Filing: 1955-09-19
•
Granted: 1960-08-30
•
Expires: 1975-09-19
Abstract
No abstract record available.
Inventors
- 👤 Jess P Wales
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:40
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/18; B02C17/183; B02C17/1835; B02C17/1855
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE239988C
Cited
DE39066C
Cited
US1126085A
Cited
US1139651A
Cited
GB152724A
Cited
US1602434A
Cited
US1690493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-30 | 1964-02-29 | 1964-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-30 | 1968-02-29 | 1968-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-30 | 1972-02-29 | 1972-08-30 | $7700.00 | Window Closed / Lapsed |