Patent US2923660A successfully refreshed from Google Patents.
US2923660A
Expired / Lapsed
US
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Process for the preparation of magnesium aluminate hydrate, and therapeutic agents so produced
Assignee: Takeda GmbH
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Filing: 1956-07-17
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Granted: 1960-02-02
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Expires: 1976-07-17
Abstract
No abstract record available.
Inventors
- 👤 Hallmann Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:25
CPC Classifications
C; C01; C01F; C01F5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A PROCESS FOR THE PREPARATION OF A MAGNESIUM ALUMINATE HYDRATE, COMPRISING THE STEPS OF THROUGHLY MIXING TOGETHER AND REACTING AT A TEMPERATURE OF ABOUT 0*C. TO 50*C. AN ALKALI ALUMINATE SOLUTION CONTAINING 3-5 MOLS OF AN ALKALI METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF SODIUM OXIDE AND POTASSIUM OXIDE PER MOL OF A12O3 WITH A MEGNESIUM SALT SOLUTION, THE MAGNESIUM SALT BEING SELECTED FROM THE GROUP CONSISTING OF THE SULFATE, CHLORIDE, BROMIDE, IODINE, NITRATE AND ACETATE OF MAGNESIUM, THE AMOUNT OF MAGNESIUM SALT SOLUTION IN THE REACTION MIXTURE BEING SUCH THAT THE ATOM-GRAM RATIO OF ALUMINUM:MAGNESIUM IS 1:0.9-3, SEPARATING THE PRECIPITATED MAGNESIUM ALUMINATE HYDRATE FROM THE REACTION MIXTURE AND WASHING THE PRECIPITATE UNTIL IT CONTAINS NO MORE THAN ABOUT 0.5% OF WATER-SOLUBLE SALTS.
Claim 2
Dependent Claim
124 words
A PROCESS FOR THE PREPARATION OF A MAGNESIUM ALUMINATE HYDRATE, COMPRISING THE STEPS OF THROUGHLY MIXING TOGETHER AND REACTING AT A TEMPERATURE OF ABOUT 0*C. TO 50*C. AN ALKALI ALUMINATE SOLUTION CONTAINING 3-5 MOLS OF AN ALKALI METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF SODIUM OXIDE AND POTASSIUM OXIDE PER MOL OF A12O3 WITH A MEGNESIUM SALT SOLUTION, THE MAGNESIUM SALT BEING SELECTED FROM THE GROUP CONSISTING OF THE SULFATE, CHLORIDE, BROMIDE, IODINE, NITRATE AND ACETATE OF MAGNESIUM, THE AMOUNT OF MAGNESIUM SALT SOLUTION IN THE REACTION MIXTURE BEING SUCH THAT THE ATOM-GRAM RATIO OF ALUMINUM:MAGNESIUM IS 1:0.9-3, SEPARATING THE PRECIPITATED MAGNESIUM ALUMINATE HYDRATE FROM THE REACTION MIXTURE AND WASHING THE PRECIPITATE UNTIL IT CONTAINS NO MORE THAN ABOUT 0.5% OF WATER-SOLUBLE SALTS.
References Cited (Backward Citations)
US2570532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |