US3557197A
Expired / Lapsed
US
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Radiopaque compounds
Assignee: Bracco SpA
•
Filing: 1969-04-07
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Granted: 1971-01-19
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Expires: 1989-04-07
Abstract
Abstract RADIOPAQUE COMPOUNDS OF THE FORMULA ((2,4,6-TRI(I-),3-(R-CO-NH-CH2-),5-(HOOC-)PHENYL)-NH- CO-)2-X ARE READILY CONVERTED TO THEIR WATER-SOLUBLE SALTS WITH SODIUM, LITHIUM, CALCIUM, MAGNESIUM, AND THE ALKANOLAMINES GENERALLY USED IN GALENIC PHARMACY, AND THE SOLUTIONS ARE GOOD CONTRAST MEDIA FOR INTRAVENOUS INJECTION IN CHOLECYSTOGRAPHY, AND PARTLY ALSO IN ANGIOGRAPHY. IN THE FORMULA, X IS ALKYLENE OR OXA-ALKYLENE HAVING 4-10 CARBON ATOMS, AND R IS LOWER ALKYL.
Inventors
- 👤 Ernst Felder
- 👤 Davide Pitre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:46
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/41; C07C51/412; A; A61; A61K; A61K49/00; A61K49/04; A61K49/0433; C07C51/02; C07C51/58; C07C51/60
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |