Patent US3587193A successfully refreshed from Google Patents.
US3587193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock polisher
Assignee: Individual
•
Filing: 1968-12-04
•
Granted: 1971-06-28
•
Expires: 1988-12-04
Abstract
Abstract APPARATUS FOR POLISHING ROCKS WHICH I CALL A ROCK ARTIFACT DINGHUMMER POLISHER. A POT CONTAINS ROCKS TO BE POLISHED AS WELL AS POLISHING MATERIAL IS SUPPORTED ON A TABLE AND MEANS ARE PROVIDED BY SHAKING THE TABLE AUTOMATICALLY WITH SHORT AND EXTREMELY RAPID VIBRATIONS TO ESTABLISH A CHURNING ACTION OF MATERIAL AND ROCKS WHEREBY POLISHING ENSUES.
Inventors
- 👤 E R Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:22
CPC Classifications
B; B24; B24B; B24B31/00; B24B31/06
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |