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Patent US3825591A successfully refreshed from Google Patents.
US3825591A
Expired / Lapsed
US
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Orally applicable contrast agents for cholecystography
Assignee: Bracco SpA
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Filing: 1972-06-01
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Granted: 1974-07-23
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Expires: 1992-06-01
Abstract
Abstract COMPOUNDS OF THE FORMULA -CO-)-BENZENE WHEREIN R1 IS METHYL OR ETHYL WHEN R2 IS HYDROGEN, OR R1 AND R2 JOINTLY ARE ETHYLENEOXYETHYLENE, AND R3 IS METHYL OR ETHYL, AND THEIR PHYSIOLOGICALLY TOLERATED ALKALI METAL, ALKALINE EARTH METAL, AND ALKANOLAMINE SALTS PRODUCE SUPERIOR X-RAY IMAGES OF THE GALL BLADDER AND OF THE BILE DUCTS AFTER ORAL INGESTION AND ARE WELL TOLERATED AND QUICKLY ELIMINATED IN EFFECTIVE DOSES. 1,3,5-TRI(I-),2-(HOOC-CH(-R3)-CH2-O-CH2-CH2-),4-(R1-N(-R2)
Inventors
- 👤 Ernst Felder
- 👤 Davide Pitre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:49
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/18; C07D295/182; C07D295/192; A; A61; A61K; A61K49/00; A61K49/04; A61K49/0433; A61K49/0447; A61K49/0495
Claims Analysis
Total Claims: 0
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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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |