US3063799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum and sodium aluminum fluorides
Assignee: Hooker Chemical Corp
•
Filing: 1960-05-25
•
Granted: 1962-11-13
•
Expires: 1980-05-25
Abstract
No abstract record available.
Inventors
- 👤 Jr John H Hinkle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:08
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/48; C01F7/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
METHOD FOR TREATING MIXTURES OF WASTE GASES AND SUSPENDED SOLIDS, SAID MIXTURES BEING OBTAINED FROM ACIDULATION AND/OR CALCINATION OF PHOSPHATIC MINERALS, TO RECOVER VALUABLE PRODUCTS THEREFROM, SAID GASES BEING AT ELEVATED TEMPERATURE AND INCLUDING AT LEAST ONE OF THE GASES SULPHUR DIOXIDE AND SULPHUR TRIOXIDE, AND AT LEAST ONE OF THE GASES, SILICON TETRAFLUORIDE, HYDROFLUOSILICIC ACID AND HYDROGEN FLUORIDE, AND SUSPENDED SOLIDS INCLUDING SILICA AND AT LEAST ONE SOLID OF TRIACALCIUM PHOSPHATE AND CALCIUM SULPHATE HYDRATES, COMPRISING THE STEPS: ()SEPARATING THE BULK OF THE SUSPENDED SOLIDS FROM SAID GASES; AND THEN, SAID GASES STILL BEING AT ELEVATED TEMPERATURE, (2) ELECTROSTATICALLY REMOVING SUBSTANTIALLY ALL OF THE REMAINING SUSPENDED SOLIDS FROM SAID GASES; AND THEN, (3) WATER WASHING SAID GASES TO DISSOLVE AND SEPARATE THE WATER SOLUBLE FLUORINE COMPONENTS; AND THEN
Claim 2
Dependent Claim
129 words
METHOD FOR TREATING MIXTURES OF WASTE GASES AND SUSPENDED SOLIDS, SAID MIXTURES BEING OBTAINED FROM ACIDULATION AND/OR CALCINATION OF PHOSPHATIC MINERALS, TO RECOVER VALUABLE PRODUCTS THEREFROM, SAID GASES BEING AT ELEVATED TEMPERATURE AND INCLUDING AT LEAST ONE OF THE GASES SULPHUR DIOXIDE AND SULPHUR TRIOXIDE, AND AT LEAST ONE OF THE GASES, SILICON TETRAFLUORIDE, HYDROFLUOSILICIC ACID AND HYDROGEN FLUORIDE, AND SUSPENDED SOLIDS INCLUDING SILICA AND AT LEAST ONE SOLID OF TRIACALCIUM PHOSPHATE AND CALCIUM SULPHATE HYDRATES, COMPRISING THE STEPS: ()SEPARATING THE BULK OF THE SUSPENDED SOLIDS FROM SAID GASES; AND THEN, SAID GASES STILL BEING AT ELEVATED TEMPERATURE, (2) ELECTROSTATICALLY REMOVING SUBSTANTIALLY ALL OF THE REMAINING SUSPENDED SOLIDS FROM SAID GASES; AND THEN, (3) WATER WASHING SAID GASES TO DISSOLVE AND SEPARATE THE WATER SOLUBLE FLUORINE COMPONENTS; AND THEN
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-12 | 1966-05-14 | 1966-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-12 | 1970-05-14 | 1970-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-12 | 1974-05-14 | 1974-11-13 | $7700.00 | Window Closed / Lapsed |