US2724499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentration of potash ores containing sylvite
Assignee: American Metal Co Ltd
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Filing: 1951-09-19
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Granted: 1955-11-22
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Expires: 1971-09-19
Abstract
No abstract record available.
Inventors
- 👤 Smith William Aubrey
- 👤 Vernon L Mattson
- 👤 Meyer Gene
- 👤 Robert A Baxter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:15
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
THE IMPROVEMENT IN THE CONCENTRATION OF SYLVITE FROM POTASH ORES CONTAINING SYLVITE IN ASSOCIATION WITH MINOR BUT OBJECTIONABLE AMOUNTS OF CLAY AND SIMILAR SLIMEFORMING CONSTITUENTS, WHICH COMPRISES FORMING THE ORE IN THE STATE OF A FEED OF SUITABLE FINENESS FOR A WET STRATIFYING SEPARATION TREATMENT INTO A PULP WITH A SATURATED AQUEOUS SOLUTION OF THE SOLUBLE ORE CONSTITUENTS, MIXING A SLIME CONTROL AGENT WITH SAID PULP IN A PROPORTION SUFFICIENT TO SUPPRESS THE TENDENCY OF THE SLIME CONSTITUENTS PRESENT TO REACT WITH A COLLECTING AGENT SUITABLE FOR COLLECTING SYLVITE, SAID SLIME CONTROL AGENT BEING SELECTED FROM THE GROUP CONSISTING OF THE POLYGLYCOLS AND THEIR ETHERS HAVING A MOLECULAR WEIGHT OF ABOUT 300, AND THEREAFTER DISTRIBUTING SUCH A COLLECTING AGENT IN SAID PULP AND THEN SUBJECTING THE MIXTURE TO A SEPARATION TREATMENT TO REMOVE THE SYLVITE.
Claim 2
Dependent Claim
135 words
THE IMPROVEMENT IN THE CONCENTRATION OF SYLVITE FROM POTASH ORES CONTAINING SYLVITE IN ASSOCIATION WITH MINOR BUT OBJECTIONABLE AMOUNTS OF CLAY AND SIMILAR SLIMEFORMING CONSTITUENTS, WHICH COMPRISES FORMING THE ORE IN THE STATE OF A FEED OF SUITABLE FINENESS FOR A WET STRATIFYING SEPARATION TREATMENT INTO A PULP WITH A SATURATED AQUEOUS SOLUTION OF THE SOLUBLE ORE CONSTITUENTS, MIXING A SLIME CONTROL AGENT WITH SAID PULP IN A PROPORTION SUFFICIENT TO SUPPRESS THE TENDENCY OF THE SLIME CONSTITUENTS PRESENT TO REACT WITH A COLLECTING AGENT SUITABLE FOR COLLECTING SYLVITE, SAID SLIME CONTROL AGENT BEING SELECTED FROM THE GROUP CONSISTING OF THE POLYGLYCOLS AND THEIR ETHERS HAVING A MOLECULAR WEIGHT OF ABOUT 300, AND THEREAFTER DISTRIBUTING SUCH A COLLECTING AGENT IN SAID PULP AND THEN SUBJECTING THE MIXTURE TO A SEPARATION TREATMENT TO REMOVE THE SYLVITE.
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) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |