US2956678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for electrostatically separating ore
Assignee: Individual
•
Filing: 1953-12-04
•
Granted: 1960-10-18
•
Expires: 1973-12-04
Abstract
No abstract record available.
Inventors
- 👤 David P Mcconnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:06
CPC Classifications
B; B03; B03C; B03C7/00; B03C7/02; B03C7/023; B03C7/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US254038A
Cited
US254039A
Cited
US1020063A
Cited
US1017701A
Cited
US1073645A
Cited
US1375741A
Cited
CH263190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |