US2842426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum fluoride manufacture
Assignee: WR Grace and Co
•
Filing: 1957-02-15
•
Granted: 1958-07-08
•
Expires: 1977-02-15
Abstract
No abstract record available.
Inventors
- 👤 Edwin M Glocker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:46
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/48; C01F7/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A METHOD FOR THE MANUFACTURE OF SUBSTANTIALLY PURE ALUMINUM FLUORIDE IN HIGH YIELDS COMPRISING REACTING BAUXITE AND WITH NOT MORE THAN ITS STOICHIOMETRIC EQUIVALENT OF A FLUORISNE CONTAINING ACID FROM THE GROUP CONSISTING OF HYDROFLUORIC AND HYDROFLUOSILICIC ACIDS AND MIXTURES THEREOF AT A TERMPERATURE ABOVE ABOUT 100*F. AND BELOW 190*F., AND SEPARATING THE RESULTING LIQUID FROM UNREACTED SOLIDS AT THE POINT OF MAXIMUM SOLUBILITY OF ALUMINUM FLUORIDE PRE-DETERMINED FOR THE SPECIFIC REACTANTS AND CONDITIONS EMPLOYED, T HEREBY OBTAINING MAXIMUM RECOVERY OF SUBSTANTIALLY PURE ALUMINUM FLUORIDE.
Claim 2
Independent Claim
85 words
A METHOD FOR THE MANUFACTURE OF SUBSTANTIALLY PURE ALUMINUM FLUORIDE IN HIGH YIELDS COMPRISING REACTING BAUXITE AND WITH NOT MORE THAN ITS STOICHIOMETRIC EQUIVALENT OF A FLUORISNE CONTAINING ACID FROM THE GROUP CONSISTING OF HYDROFLUORIC AND HYDROFLUOSILICIC ACIDS AND MIXTURES THEREOF AT A TERMPERATURE ABOVE ABOUT 100*F. AND BELOW 190*F., AND SEPARATING THE RESULTING LIQUID FROM UNREACTED SOLIDS AT THE POINT OF MAXIMUM SOLUBILITY OF ALUMINUM FLUORIDE PRE-DETERMINED FOR THE SPECIFIC REACTANTS AND CONDITIONS EMPLOYED, T HEREBY OBTAINING MAXIMUM RECOVERY OF SUBSTANTIALLY PURE ALUMINUM FLUORIDE.
References Cited (Backward Citations)
US508796A
Cited
US1403183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |