Patent US2750257A successfully refreshed from Google Patents.
US2750257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making aluminum halides
Assignee: Individual
•
Filing: 1952-08-15
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Granted: 1956-06-12
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Expires: 1972-08-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Clare Peter Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:27
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A METHOD OF PRODUCING ALUMINUM CHLORIDE WHICH COMPRISES HEATING A SUBSTANTIALLY ANHYDROUS AND SILICAFREE MIXTURE OF ALUMINUM FLUORIDE AND AN ALKALINE EARTH METAL CHLORIDE SELECTED FROM THE GROUP CONSISTING OF CALCIUM AMD MAGNESIUM CHLORIDES AT A TEMPERATURE ABOVE THE VAPORIZING TEMPERATURE OF ALUMINUM CHLORIDE TO VAPORIZE ALUMINUM CHLORIDE FROM SAID MIXTURE.
Claim 2
Independent Claim
51 words
A METHOD OF PRODUCING ALUMINUM CHLORIDE WHICH COMPRISES HEATING A SUBSTANTIALLY ANHYDROUS AND SILICAFREE MIXTURE OF ALUMINUM FLUORIDE AND AN ALKALINE EARTH METAL CHLORIDE SELECTED FROM THE GROUP CONSISTING OF CALCIUM AMD MAGNESIUM CHLORIDES AT A TEMPERATURE ABOVE THE VAPORIZING TEMPERATURE OF ALUMINUM CHLORIDE TO VAPORIZE ALUMINUM CHLORIDE FROM SAID MIXTURE.
References Cited (Backward Citations)
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Cited
US1566269A
Cited
US1716102A
Cited
US1764502A
Cited
US1764501A
Cited
US1818839A
Cited
US2258412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |