US2866714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating kyanite concentrates
Assignee: Individual
•
Filing: 1956-04-16
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Granted: 1958-12-30
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Expires: 1976-04-16
Abstract
No abstract record available.
Inventors
- 👤 Voldemars D Svikis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:27
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/18; C04B35/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A METHOD OF TREATING CONCENTRATES OF DISSEMINATED TYPE KYANITE TO PRODUCE A DENSE, VOLUME-STABLE PRODUCT WHICH COMPRISES FINELY DIVIDING THE CONCENTRATES TO PASS THROUGH A SCREEN HAVING AT LEAST 200 MESHES PER INCH, UNIFORMLY MIXING THE CONCENTRATE WITH AT LEAST 0.1% BY WEIGHT OF AN ADDITIVE BEING ONE OF A GROUP CONSISTING OF PHOSPHORIC ACID, PHOSPHORUS PENTOXIDE AND SOLUBLE ALUMINUM PHOSPHATES AND TEMPERING WATER, FORMING THE MIXTURE INTO BRIQUETTES UNDER A PRESSURE OF 2,000 TO 10,000 P. S. I. AND FIRING THE BRIQUETTES AT A TEMPERATURE OF NOT LESS THAN 1550*C. AND LESS THAN THE FUSION TEMPERATURE OF MULLITE TO CONVERT THE KYANITE INTO A DENSE, VOLUME-STABLE MULTI PRODUCT.
Claim 2
Independent Claim
109 words
A METHOD OF TREATING CONCENTRATES OF DISSEMINATED TYPE KYANITE TO PRODUCE A DENSE, VOLUME-STABLE PRODUCT WHICH COMPRISES FINELY DIVIDING THE CONCENTRATES TO PASS THROUGH A SCREEN HAVING AT LEAST 200 MESHES PER INCH, UNIFORMLY MIXING THE CONCENTRATE WITH AT LEAST 0.1% BY WEIGHT OF AN ADDITIVE BEING ONE OF A GROUP CONSISTING OF PHOSPHORIC ACID, PHOSPHORUS PENTOXIDE AND SOLUBLE ALUMINUM PHOSPHATES AND TEMPERING WATER, FORMING THE MIXTURE INTO BRIQUETTES UNDER A PRESSURE OF 2,000 TO 10,000 P. S. I. AND FIRING THE BRIQUETTES AT A TEMPERATURE OF NOT LESS THAN 1550*C. AND LESS THAN THE FUSION TEMPERATURE OF MULLITE TO CONVERT THE KYANITE INTO A DENSE, VOLUME-STABLE MULTI PRODUCT.
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) | 1961-12-29 | 1962-06-30 | 1962-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-29 | 1966-06-30 | 1966-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-29 | 1970-06-30 | 1970-12-30 | $7700.00 | Window Closed / Lapsed |