US3343909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of vanadium and phosphorus values from ferrophosphorus
Assignee: Monsanto Co
•
Filing: 1963-06-19
•
Granted: 1967-09-26
•
Expires: 1983-06-19
Abstract
No abstract record available.
Inventors
- 👤 Kim Keun Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:20
CPC Classifications
C; C01; C01G; C01G31/00; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/30; C01B25/305
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
66 words
A METHOD FOR SEPARATING PHOSPHORUS VALUES FROM A SALT-ROAST FERROPHOSPHORUS COMPRISING CONTACTING SAID FERROPHOSPHORUS WITH AN AQUEOUS INORGANIC ALKALINE SOLUTION HAVING A PH GREATER THAN ABOUT 11 AT A TEMPERATURE OF FROM ABOUT 25*C. TO THE BOILING TEMPERATURE OF SAID ALKALINE SOLUTION AND FOR A TIME SUFFICIENT TO SOLUBILIZE SAID PHOSPHORUS VALUES THEREIN AND SEPARATING THE ALKALINE SOLUTION CONTAINING SAID PHOSPHORUS VALUES AND THE FERROPHOSPHORUS RESIDUE.
Claim 2
Independent Claim
66 words
A METHOD FOR SEPARATING PHOSPHORUS VALUES FROM A SALT-ROAST FERROPHOSPHORUS COMPRISING CONTACTING SAID FERROPHOSPHORUS WITH AN AQUEOUS INORGANIC ALKALINE SOLUTION HAVING A PH GREATER THAN ABOUT 11 AT A TEMPERATURE OF FROM ABOUT 25*C. TO THE BOILING TEMPERATURE OF SAID ALKALINE SOLUTION AND FOR A TIME SUFFICIENT TO SOLUBILIZE SAID PHOSPHORUS VALUES THEREIN AND SEPARATING THE ALKALINE SOLUTION CONTAINING SAID PHOSPHORUS VALUES AND THE FERROPHOSPHORUS RESIDUE.
Claim 3
Independent Claim
92 words
A METHOD FOR SEPARATING PHOSPHORUS VALUES FROM A SALT-ROAST FERROPHOSPHORUS CONTAINING VANADIUM VALUES COMPRISING CONTACTING SAID FERROPHOSPHORUS WITH WATER HAVING A PH BETWEEN ABOUT 6 AND 7.5 WHEREBY SAID VANADIUM VALUES ARE SOLUBILIZED THEREIN, SEPARATING THE WATER AND THE FERROPHOSPHORUS RESIDUE, CONTACTING SAID FERROPHOSPHORUS RESIDUE WITH AN AQUEOUS INORGANIC ALKALINE SOLUTION HAVING A PH GREATER THAN 7.5 AT A TEMPERATURE OF FROM ABOUT 25*C. AND THE BOILING TEMPERATURE OF SAID SOLUTION, WHEREBY SAID PHOSPHORUS VALUES ARE SOLUBILIZED THEREIN AND SEPARATING THE AQUEOUS ALKALINE SOLUTION CONTAINING SAID PHOSPHORUS VALUES AND THE FERROPHOSPHORUS RESIDUE.
Claim 4
Independent Claim
92 words
A METHOD FOR SEPARATING PHOSPHORUS VALUES FROM A SALT-ROAST FERROPHOSPHORUS CONTAINING VANADIUM VALUES COMPRISING CONTACTING SAID FERROPHOSPHORUS WITH WATER HAVING A PH BETWEEN ABOUT 6 AND 7.5 WHEREBY SAID VANADIUM VALUES ARE SOLUBILIZED THEREIN, SEPARATING THE WATER AND THE FERROPHOSPHORUS RESIDUE, CONTACTING SAID FERROPHOSPHORUS RESIDUE WITH AN AQUEOUS INORGANIC ALKALINE SOLUTION HAVING A PH GREATER THAN 7.5 AT A TEMPERATURE OF FROM ABOUT 25*C. AND THE BOILING TEMPERATURE OF SAID SOLUTION, WHEREBY SAID PHOSPHORUS VALUES ARE SOLUBILIZED THEREIN AND SEPARATING THE AQUEOUS ALKALINE SOLUTION CONTAINING SAID PHOSPHORUS VALUES AND THE FERROPHOSPHORUS RESIDUE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |