US2885393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dextran-iron complex and process for making same
Assignee: R K LAROS Co
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Filing: 1956-02-24
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Granted: 1959-05-05
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Expires: 1976-02-24
Abstract
No abstract record available.
Inventors
- 👤 John R Herb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:48
CPC Classifications
A; A61; A61K; A61K33/00; A61K33/24; A61K33/26; A61K31/00; A61K31/28; A61K31/295; C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0009; C08B37/0021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
THE PROCESS OF PRODUCING A COMPOSITION WHICH COMPRISES HEATING AN AQUEOUS SOLUTION OF DEXTRAN AND A WATER SOLUBLE FERRIC SALT IN ADMIXTURE WITH AN ALKALI AT A PH OF ABOUT 2.3 TO FORM A PRECIPITABLE IRON-DEXTRAN COMPOSITION, PRECIPITATING THE IRON-DEXTRAN COMPOSITION AND REDISSOLVING THE SAME IN WATER FORMING AN ACID SOLUTION HAVING A PH OF ABOUT 2.3, HEATING THE DISSOLVED IRONDEXTRAN COMPOSITION UNDER A PRESSURE OF ABOUT 15 P.S.I. AND UNDER ACIDIC CONDITIONS, DISCONTINUING THE HEATING UNDER PRESSURE AND ALLOWING THE SOLUTION TO COOL, ADDING AN ALKALI TO THE COLD DISSOLVED IRON-DEXTRAN COMPOSITION IN AMOUNTS SUFFICIENT TO RENDER THE SOLUTION ALKALINE, HEATING THE DISSOLVED ALKALINE IRON-DEXTRAN COMPOSITION UNDER A PRESSURE OF ABOUT 15 P.S.I., DISCONTINUING THE HEATING UNDER PRESSURE, AND RECOVERING THE RESULTING IRON-DEXTRAN COMPLEX.
Claim 2
Dependent Claim
125 words
THE PROCESS OF PRODUCING A COMPOSITION WHICH COMPRISES HEATING AN AQUEOUS SOLUTION OF DEXTRAN AND A WATER SOLUBLE FERRIC SALT IN ADMIXTURE WITH AN ALKALI AT A PH OF ABOUT 2.3 TO FORM A PRECIPITABLE IRON-DEXTRAN COMPOSITION, PRECIPITATING THE IRON-DEXTRAN COMPOSITION AND REDISSOLVING THE SAME IN WATER FORMING AN ACID SOLUTION HAVING A PH OF ABOUT 2.3, HEATING THE DISSOLVED IRONDEXTRAN COMPOSITION UNDER A PRESSURE OF ABOUT 15 P.S.I. AND UNDER ACIDIC CONDITIONS, DISCONTINUING THE HEATING UNDER PRESSURE AND ALLOWING THE SOLUTION TO COOL, ADDING AN ALKALI TO THE COLD DISSOLVED IRON-DEXTRAN COMPOSITION IN AMOUNTS SUFFICIENT TO RENDER THE SOLUTION ALKALINE, HEATING THE DISSOLVED ALKALINE IRON-DEXTRAN COMPOSITION UNDER A PRESSURE OF ABOUT 15 P.S.I., DISCONTINUING THE HEATING UNDER PRESSURE, AND RECOVERING THE RESULTING IRON-DEXTRAN COMPLEX.
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) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |