US3254948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of removing iron from aluminum salt solutions
Assignee: Stauffer Chemical Co
•
Filing: 1963-09-03
•
Granted: 1966-06-07
•
Expires: 1983-09-03
Abstract
No abstract record available.
Inventors
- 👤 Carl E Stromberg
- 👤 Richard W Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:54
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/68; C01F7/74; C01F7/746; C01F7/748; C01F7/48; C01F7/56; C01F7/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PROCESS OF REMOVING IRON FROM ALUMINUM SULFATE AND ALUMINUM CHLORIDE SOLUTIONS, WHICH COMPRISES EXTRACTING AN AQUEOUS SOLUTION OF A SALT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM SULFATE AND ALUMINUM CHLORIDE IN WHICH THE IRON IS PRESENT IN THE TRIVALENT FORM, WITH A BETA-DIKETONE TO FORM AN IRON CHELATE AND SEPARATING SAID IRON CHELATE FROM SAID ALUMINUM SALT SOLUTION.
Claim 2
Dependent Claim
60 words
A PROCESS OF REMOVING IRON FROM ALUMINUM SULFATE AND ALUMINUM CHLORIDE SOLUTIONS, WHICH COMPRISES EXTRACTING AN AQUEOUS SOLUTION OF A SALT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM SULFATE AND ALUMINUM CHLORIDE IN WHICH THE IRON IS PRESENT IN THE TRIVALENT FORM, WITH A BETA-DIKETONE TO FORM AN IRON CHELATE AND SEPARATING SAID IRON CHELATE FROM SAID ALUMINUM SALT SOLUTION.
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |