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US2746906A
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Carboxymethyl dextran ether-stabilized contrast compositions
Assignee: Midland Chemical Corp
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Filing: 1954-04-05
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Granted: 1956-05-22
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Expires: 1974-04-05
Abstract
No abstract record available.
Inventors
- 👤 Leo J Novak
- 👤 Walter S Hogue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:30
CPC Classifications
A; A61; A61K; A61K49/00; A61K49/04; A61K49/0404
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A STABLE, INGESTABLE COMPOSITION FOR USE IN RADIOGRAPHY COMPRISING FROM 99.5% TO 99.8% OF AN AQUEOUS SUSPENSION OF BARIUM SULFATE CONTAINING FROM 5% TO 30% OF THE SULFATE AND, AS STABILIZER FOR THE SUSPENSION, FROM 0.2% TO 0.5% OF A CARBOXYMETHYL ETHER OF NATIVE, UNHYDROLYZED DEXTRAN, SAID SUSPENSION HAVING A PH BETWEEN 5.0 AND 9.5.
Claim 2
Dependent Claim
55 words
A STABLE, INGESTABLE COMPOSITION FOR USE IN RADIOGRAPHY COMPRISING FROM 99.5% TO 99.8% OF AN AQUEOUS SUSPENSION OF BARIUM SULFATE CONTAINING FROM 5% TO 30% OF THE SULFATE AND, AS STABILIZER FOR THE SUSPENSION, FROM 0.2% TO 0.5% OF A CARBOXYMETHYL ETHER OF NATIVE, UNHYDROLYZED DEXTRAN, SAID SUSPENSION HAVING A PH BETWEEN 5.0 AND 9.5.
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) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |