US2519361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of magnesium carbonate or magnesium oxide containing little or no calcium
Assignee: Individual
•
Filing: 1944-12-12
•
Granted: 1950-08-22
•
Expires: 1964-12-12
Abstract
No abstract record available.
Inventors
- 👤 Robert L Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:42
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
IN A PROCESS FOR THE PRODUCTION OF A PURIFIED MAGNESIUM COMPOUND INVOLVING THE CARBONATION OF AN AQUEOUS SLURRY OF CALCINED MAGNSITE CONTAINING SMALL AMOUNTS OF LIME AS AN IMPURITY, AND THE SEPARATION OF A MAGNESIUM BICARBONATE SOLUTION, THE IMPROVEMENT WHICH COMPRISES ADDING AN EXCESS OF LIME TO THE SLURRY UNDERGOING CARBONATION, WHEREBY SUBSTANTIALLY ALL OF THE CALCIUM IS PRECIPITATED FROM SOLUTION.
Claim 2
Dependent Claim
61 words
IN A PROCESS FOR THE PRODUCTION OF A PURIFIED MAGNESIUM COMPOUND INVOLVING THE CARBONATION OF AN AQUEOUS SLURRY OF CALCINED MAGNSITE CONTAINING SMALL AMOUNTS OF LIME AS AN IMPURITY, AND THE SEPARATION OF A MAGNESIUM BICARBONATE SOLUTION, THE IMPROVEMENT WHICH COMPRISES ADDING AN EXCESS OF LIME TO THE SLURRY UNDERGOING CARBONATION, WHEREBY SUBSTANTIALLY ALL OF THE CALCIUM IS PRECIPITATED FROM 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) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |