US2661908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air swept tube mill with pocketed liner structure for automatic classification of grinding bodies and ground material
Assignee: Individual
•
Filing: 1950-05-08
•
Granted: 1953-12-08
•
Expires: 1970-05-08
Abstract
No abstract record available.
Inventors
- 👤 Jean A Slegten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:39
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/18; B02C17/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US689347A
Cited
GB190202385A
Cited
US953092A
Cited
US1118775A
Cited
US1369061A
Cited
US1591941A
Cited
US1541114A
Cited
US1692974A
Cited
US1780132A
Cited
US1788825A
Cited
US2042254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |