Patent US2844439A successfully refreshed from Google Patents.
US2844439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of aluminum sulphate from waste materials
Assignee: Individual
•
Filing: 1956-09-10
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Granted: 1958-07-22
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Expires: 1976-09-10
Abstract
No abstract record available.
Inventors
- 👤 Schurr Chris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:03
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/68; C01F7/74; C01F7/743; Y; Y10; Y10S; Y10S423/00; Y10S423/01; Y10S423/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THE PROCESS OF TREATING INERT ALUMINUM HYDRATE CONTAINING MINERAL, WHICH COMPRISES REACTING FINELY DIVIDED INERT ALUMINUM HYDRATE MINERAL WITH FINELY DIVIDED QUICK LIME IN WATER, THEN REACTING THE ABOVE PRODUCT WITH SULPHURIC ACID SOLUTION CONTANING IRON WHILE OXIDIZING THE IRON TO FERRIC IRON AND PROPORTIONING THE REACTING INGREDIENTS TO MAINTAIN A PH ON THE ACID SIDE OF 3.5, AND SEPARATING THE ALUMINUM SULPHATE PRODUCED FROM THE SOLID RESIDUE.
Claim 2
Dependent Claim
68 words
THE PROCESS OF TREATING INERT ALUMINUM HYDRATE CONTAINING MINERAL, WHICH COMPRISES REACTING FINELY DIVIDED INERT ALUMINUM HYDRATE MINERAL WITH FINELY DIVIDED QUICK LIME IN WATER, THEN REACTING THE ABOVE PRODUCT WITH SULPHURIC ACID SOLUTION CONTANING IRON WHILE OXIDIZING THE IRON TO FERRIC IRON AND PROPORTIONING THE REACTING INGREDIENTS TO MAINTAIN A PH ON THE ACID SIDE OF 3.5, AND SEPARATING THE ALUMINUM SULPHATE PRODUCED FROM THE SOLID RESIDUE.
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) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |