Patent US489821A successfully refreshed from Google Patents.
Patent US2660541A successfully refreshed from Google Patents.
US2660541A
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Method of treating water soluble salt to decrease caking and rate of leaching by ground water
Assignee: Trojan Powder Co
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Filing: 1950-09-06
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Granted: 1953-11-24
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Expires: 1970-09-06
Abstract
No abstract record available.
Inventors
- 👤 William H Rinkenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:11
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/30; C; C05; C05G; C05G3/00; C05G3/30; C05G5/00; C05G5/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN TREATING A WATER SOLUBLE SALT TO DECREASE CAKING BEFORE USE AND RATE OF LEACHING BY GROUND WATER, THE METHOD WHICH COMPRISES APPLYING TO THE SALT IN THE FORM OF GRANULES AN AQUEOUS SOLUTION OF AN ALAKALI METAL SILICA AND A SUSPENSION THEREIN OF ALUMINUM OXIDE POWDER, MIXING THE GRANULES OF THE SALT AND APPLIED SOLUTION AND SUSPENSION, SO THAT THE GRANULES ARE KEPT IN MOTION, THE APPLIED MATERIALS ARE DISTRIBUTED OVER THE SURFACE OF THE GRANULES, THE SUSPENDED ALUMINUM OXIDE POWDER REMAINS ON THE SAID SURFACE, AND THE SILICATE SOLUTION ENTERS SURFACE PORTIONS OF THE GRANULES, AND MAINTAINING THE MIXED MATERIALS IN MOTION AND AT AN ELEVATED TEMPERATURE UNTIL THE SILICATE AND ALUMINUM OXIDE HAVE REACTED TO FORM A PROTECTING FILM OVER THE INDIVIDUAL GRANULES OF THE SAID SOLUBLE SALT.
Claim 2
Dependent Claim
131 words
IN TREATING A WATER SOLUBLE SALT TO DECREASE CAKING BEFORE USE AND RATE OF LEACHING BY GROUND WATER, THE METHOD WHICH COMPRISES APPLYING TO THE SALT IN THE FORM OF GRANULES AN AQUEOUS SOLUTION OF AN ALAKALI METAL SILICA AND A SUSPENSION THEREIN OF ALUMINUM OXIDE POWDER, MIXING THE GRANULES OF THE SALT AND APPLIED SOLUTION AND SUSPENSION, SO THAT THE GRANULES ARE KEPT IN MOTION, THE APPLIED MATERIALS ARE DISTRIBUTED OVER THE SURFACE OF THE GRANULES, THE SUSPENDED ALUMINUM OXIDE POWDER REMAINS ON THE SAID SURFACE, AND THE SILICATE SOLUTION ENTERS SURFACE PORTIONS OF THE GRANULES, AND MAINTAINING THE MIXED MATERIALS IN MOTION AND AT AN ELEVATED TEMPERATURE UNTIL THE SILICATE AND ALUMINUM OXIDE HAVE REACTED TO FORM A PROTECTING FILM OVER THE INDIVIDUAL GRANULES OF THE SAID SOLUBLE SALT.
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) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |