US3002811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of purifying alkali metal iodides
Assignee: Harshaw Chemical Co
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Filing: 1959-05-28
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Granted: 1961-10-03
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Expires: 1979-05-28
Abstract
No abstract record available.
Inventors
- 👤 Irwin E Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:14
CPC Classifications
C; C01; C01D; C01D17/00; C01D15/00; C01D15/04; C01D3/00; C01D3/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A METHOD FOR THE PURIFICATION OF POTASSIUM CONTAMINATED ALKALI METAL IODIDE SELECTED FROM THE GROUP CONSISTING OF LITHIUM IODIDE, SODIUM IODIDE, CESIUM IODIDE AND RUBIDIUM IODIDE WHEREIN THE CONTAMINATED ALKALI METAL IODIDE IS FIRST DISSOLVED IN A HOT LIQUOR CONSISTING OF WATER AND HYDRIODIC ACID AND THEN CRYSTALLIZED FROM SAID LIQUOR BY COOLING TO ABOUT 30*C., WHEREBY PURIFIED ALKALI METAL IODIDE CRYSTALS ARE FORMED WHILE SUBSTANTIAL PROPORTIONS OF SAID CONTAMINANTS REMAIN IN THE RSULTING MOTHER LIQUOR.
Claim 2
Independent Claim
76 words
A METHOD FOR THE PURIFICATION OF POTASSIUM CONTAMINATED ALKALI METAL IODIDE SELECTED FROM THE GROUP CONSISTING OF LITHIUM IODIDE, SODIUM IODIDE, CESIUM IODIDE AND RUBIDIUM IODIDE WHEREIN THE CONTAMINATED ALKALI METAL IODIDE IS FIRST DISSOLVED IN A HOT LIQUOR CONSISTING OF WATER AND HYDRIODIC ACID AND THEN CRYSTALLIZED FROM SAID LIQUOR BY COOLING TO ABOUT 30*C., WHEREBY PURIFIED ALKALI METAL IODIDE CRYSTALS ARE FORMED WHILE SUBSTANTIAL PROPORTIONS OF SAID CONTAMINANTS REMAIN IN THE RSULTING MOTHER LIQUOR.
References Cited (Backward Citations)
US2415346A
Cited
US2640755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-02 | 1965-04-03 | 1965-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-02 | 1969-04-03 | 1969-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-02 | 1973-04-03 | 1973-10-03 | $7700.00 | Window Closed / Lapsed |