Patent US2665969A successfully refreshed from Google Patents.
US2665969A
Expired / Lapsed
US
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Purification of aluminum sulfate liquors
Assignee: Honeywell International Inc
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Filing: 1952-10-24
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Granted: 1954-01-12
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Expires: 1972-10-24
Abstract
No abstract record available.
Inventors
- 👤 Robert V Townend
- 👤 Horace Q Trout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:42
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/68; C01F7/74; C01F7/746; C01F7/748
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A PROCESS FOR THE REMOVAL OF POTASSIUM FROM ALUMINUM SULFATE LIQUORS CONTAINING POTASSIUM COMPRISING SUBJECTING THE LIQUOR TO THE ZEOLITIC ACTION OF A HYDRATED SODIUM-IRON BASIC SULFATE.
Claim 2
Dependent Claim
27 words
A PROCESS FOR THE REMOVAL OF POTASSIUM FROM ALUMINUM SULFATE LIQUORS CONTAINING POTASSIUM COMPRISING SUBJECTING THE LIQUOR TO THE ZEOLITIC ACTION OF A HYDRATED SODIUM-IRON BASIC SULFATE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |