US3609921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tumbling mill
Assignee: Individual
•
Filing: 1970-01-09
•
Granted: 1971-10-05
•
Expires: 1990-01-09
Abstract
Abstract A TUMBLING MILL IS PROVIDED FOR USE IN GRIDING, PULVERIZING AND POLISHING VARIOUS MATERIALS. THE MILL IS ADAPTED TO GENERATE A MULTIPLICITY OF MOTIONS. A MILL CHAMBER ROTATES ABOUT A HORIZONTAL AXIS AROUND A CLOSED, UNDULATING TRACK MOVING RADIALLY IN AND OUT WITH RESPECT TO A VERTICAL DRIVING AXIS, WHICH DRIVING AXIS ITSELF RECIPROCATES VERTICALLY CAUSING THE CHAMBER TO TILT ABOUT ITS HORIZONTAL AXIS.
Inventors
- 👤 Cecil A Foster
- 👤 George W Booth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:58
CPC Classifications
B; B24; B24B; B24B31/00; B24B31/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |