US2999595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for flotation concentration in coarse size range
Assignee: Potash Corp of Saskatchewan Inc
•
Filing: 1959-09-08
•
Granted: 1961-09-12
•
Expires: 1979-09-08
Abstract
No abstract record available.
Inventors
- 👤 Edmund A Schoeld
- 👤 Jack D Nabors
- 👤 Joseph S Reiter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:12
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/24; B03D1/02; B03D1/028; B03D1/1406; B03D1/1412; B03D1/1493
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1380665A
Cited
US1269150A
Cited
US1380650A
Cited
US1401598A
Cited
US1440129A
Cited
US1912630A
Cited
DE612368C
Cited
US2143669A
Cited
US2184115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |