US3079228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of aluminum sulfate
Assignee: Wyeth Holdings LLC
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Filing: 1960-01-12
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Granted: 1963-02-26
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Expires: 1980-01-12
Abstract
No abstract record available.
Inventors
- 👤 Carl E Skay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:00
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/68; C01F7/74; C01F7/743
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A METHOD FOE THE PRODUCTION OF ALUMINUM SULFATE WHICH COMPRISES DIGESTING WITH SULFURIC ACID AN EXCESS OF A BAUXITE ORE OVER THE AMOUNT THEORETICALLY NECESSARY TO COMBINE WITH ALL OF THE SULFURIC ACID PRESENT, SEPARATING THE SOLID RESIDUE FROM THE RESULTING ALUMINUM SULFATE, MIXING SAID RESIDUE WITH AN EXCESS OF ADDITIONAL SULFURIC ACID OVER THAT NECESSARY TO COMBINE WITH ALL OF ITS REMAINING ALUMINUM OXIDE CONTENT AND DIGESTING THE RESULTING MIXTURE AT 215* -230* F.
Claim 2
Independent Claim
75 words
A METHOD FOE THE PRODUCTION OF ALUMINUM SULFATE WHICH COMPRISES DIGESTING WITH SULFURIC ACID AN EXCESS OF A BAUXITE ORE OVER THE AMOUNT THEORETICALLY NECESSARY TO COMBINE WITH ALL OF THE SULFURIC ACID PRESENT, SEPARATING THE SOLID RESIDUE FROM THE RESULTING ALUMINUM SULFATE, MIXING SAID RESIDUE WITH AN EXCESS OF ADDITIONAL SULFURIC ACID OVER THAT NECESSARY TO COMBINE WITH ALL OF ITS REMAINING ALUMINUM OXIDE CONTENT AND DIGESTING THE RESULTING MIXTURE AT 215* -230* F.
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) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |