US2771353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fused potash product and method for forming same
Assignee: Potash Corp of Saskatchewan Inc
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Filing: 1950-11-16
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Granted: 1956-11-20
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Expires: 1970-11-16
Abstract
No abstract record available.
Inventors
- 👤 Emory W Douglass
- 👤 Parker S Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:50
CPC Classifications
C; C01; C01D; C01D3/00; C01D3/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
THE PROCESS OF DECREASING THE HYGROSCOPICITY OF POTASH MATERIAL COMPRISING AT LEAST ABOUT 95% POTASSIUM CHLORIDE MIXED WITH LESSER QUANTITIES OF IMPURITIES INCLUDING SODIUM CHLORIDE OR SULFATES OF POTASSIUM, WHICH COMPRISES THE STEPS OF FUSING SUCH A MATERIAL AND THEN COOLING IT TO FORM A SOLIDIFIED MATERIAL, SAID COOLING INCLUDING CONTACTING A THIN FILM OF THE MOLTEN MATERIAL WITH A COOL HORIZONTAL METAL SURFACE TO LOWER THE TEMPERATURE THROUGHOUT THE MATERIAL FROM ABOUT ITS MELTING POINT TO ABOUT 500* C. IN NOT MORE THAN ABOUT FORTY SECONDS AND SCRAPING THE SOLIDIFIED MATERIAL FROM THE SURFACE TO FORM A FLAKED MATERIAL CHARACTERIZED BY THE ABSENCE OF OBSERVABLE CRYSTAL STRUCTURE, LOW HYGROSCOPICITY AND REDUCED CAKING TENDENCY.
Claim 2
Dependent Claim
114 words
THE PROCESS OF DECREASING THE HYGROSCOPICITY OF POTASH MATERIAL COMPRISING AT LEAST ABOUT 95% POTASSIUM CHLORIDE MIXED WITH LESSER QUANTITIES OF IMPURITIES INCLUDING SODIUM CHLORIDE OR SULFATES OF POTASSIUM, WHICH COMPRISES THE STEPS OF FUSING SUCH A MATERIAL AND THEN COOLING IT TO FORM A SOLIDIFIED MATERIAL, SAID COOLING INCLUDING CONTACTING A THIN FILM OF THE MOLTEN MATERIAL WITH A COOL HORIZONTAL METAL SURFACE TO LOWER THE TEMPERATURE THROUGHOUT THE MATERIAL FROM ABOUT ITS MELTING POINT TO ABOUT 500* C. IN NOT MORE THAN ABOUT FORTY SECONDS AND SCRAPING THE SOLIDIFIED MATERIAL FROM THE SURFACE TO FORM A FLAKED MATERIAL CHARACTERIZED BY THE ABSENCE OF OBSERVABLE CRYSTAL STRUCTURE, LOW HYGROSCOPICITY AND REDUCED CAKING TENDENCY.
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) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |