US3282416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating quartz sands
Assignee: Honeywell International Inc
•
Filing: 1962-10-22
•
Granted: 1966-11-01
•
Expires: 1982-10-22
Abstract
No abstract record available.
Inventors
- 👤 Hugh W Coke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:29
CPC Classifications
C; C03; C03C; C03C1/00; C03C1/02; C03C1/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A METHOD OF BENEFICIATING QUARTZ SAND CONTAINING A HIGH A VARIABLE CONTENT OF HIGHLY REFRACTORY ALUMINUM SILICATES INCLUDING HIGHLY REFRACTORY ALUMINUOUS MATERIAL OF THE ANAUXITE-TYPE, THE STEPS OF: REMOVING CLAY-LIKE FOREIGN MATTER FROM IMPURE QUARTZ SANDS BY WASHING AND DECANTATION WITH WATER TO PRODUCE A SAND SLURRY; ADJUSTING THE PH OF THE SLURRY TO A POINT AWAY FROM NEUTRALITY BUT TO NOT BELOW A PH OF 2.5 NOR ABOVE PH 11; ADDING BETWEEN ABOUT 0.3 TO 0.5 LBS. OF A PRIMARY FATTY AMINE WHOSE ALKYL GROUPS CONTAIN BETWEEN 8 AND 22 CARBON ATOMS TO THE SLURRY PER TON OF SOLIDS IN SUCH SLURRY; SUBJECTING THE SLURRY SO TREATED TO FLOATION WITH AGITATION AND INTRODUCTION OF AIR TO FLOAT OFF A FRACTION CONTAINING REFRACTORY ALUMINOUS MATERIAL OF THE ANAUXITE-TYPE AND PRODUCE A RESIDUAL SAND CONTAINING NOT MORE THAN ABOUT 0.2% OF REFRACTORY ALUMINA.
Claim 2
Dependent Claim
143 words
IN A METHOD OF BENEFICIATING QUARTZ SAND CONTAINING A HIGH A VARIABLE CONTENT OF HIGHLY REFRACTORY ALUMINUM SILICATES INCLUDING HIGHLY REFRACTORY ALUMINUOUS MATERIAL OF THE ANAUXITE-TYPE, THE STEPS OF: REMOVING CLAY-LIKE FOREIGN MATTER FROM IMPURE QUARTZ SANDS BY WASHING AND DECANTATION WITH WATER TO PRODUCE A SAND SLURRY; ADJUSTING THE PH OF THE SLURRY TO A POINT AWAY FROM NEUTRALITY BUT TO NOT BELOW A PH OF 2.5 NOR ABOVE PH 11; ADDING BETWEEN ABOUT 0.3 TO 0.5 LBS. OF A PRIMARY FATTY AMINE WHOSE ALKYL GROUPS CONTAIN BETWEEN 8 AND 22 CARBON ATOMS TO THE SLURRY PER TON OF SOLIDS IN SUCH SLURRY; SUBJECTING THE SLURRY SO TREATED TO FLOATION WITH AGITATION AND INTRODUCTION OF AIR TO FLOAT OFF A FRACTION CONTAINING REFRACTORY ALUMINOUS MATERIAL OF THE ANAUXITE-TYPE AND PRODUCE A RESIDUAL SAND CONTAINING NOT MORE THAN ABOUT 0.2% OF REFRACTORY ALUMINA.
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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |