US2951585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of pyrochlore from calcite, apatite and silica
Assignee: Individual
•
Filing: 1958-09-08
•
Granted: 1960-09-06
•
Expires: 1978-09-08
Abstract
No abstract record available.
Inventors
- 👤 Burks Herbert George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:52
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/01; B03D2201/00; B03D2201/06; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR THE SEPARATION OF PYROCHLORE FROM MINERAL ORE CONTAINING CALCITE, APATITE AND SILICA WHICH COMPRISES SUBJECTING THE ORE TO FROTH FLOTATION IN THE PRESENCE OF AT LEAST ONE REAGENT SELECTED FROM THE GROUP CONSISTING OF MONOAMINES AND DIAMINES CONTAINING 14 TO 22 CARBON ATOMS IN THE MOLECULE TO FLOAT THE PYROCHLORE AND SILICA AWAY FROM THE CALCITE AND APATITE, TREATING THE FLOAT PRODUCT WITH A DEPRESSANT IN A QUANTITY SUFFICIENT TO NEUTRALIZE THE ACTIVATING EFFECT OF SAID REAGENT, AND
Claim 2
Dependent Claim
81 words
A PROCESS FOR THE SEPARATION OF PYROCHLORE FROM MINERAL ORE CONTAINING CALCITE, APATITE AND SILICA WHICH COMPRISES SUBJECTING THE ORE TO FROTH FLOTATION IN THE PRESENCE OF AT LEAST ONE REAGENT SELECTED FROM THE GROUP CONSISTING OF MONOAMINES AND DIAMINES CONTAINING 14 TO 22 CARBON ATOMS IN THE MOLECULE TO FLOAT THE PYROCHLORE AND SILICA AWAY FROM THE CALCITE AND APATITE, TREATING THE FLOAT PRODUCT WITH A DEPRESSANT IN A QUANTITY SUFFICIENT TO NEUTRALIZE THE ACTIVATING EFFECT OF SAID REAGENT, AND
References Cited (Backward Citations)
US2614692A
Cited
US2875896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |