US3867431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contrast agent for angiography and urography
Assignee: Bracco SpA
•
Filing: 1972-07-25
•
Granted: 1975-02-18
•
Expires: 1992-07-25
Abstract
Abstract 3-(N- Beta , gamma -dihydroxypropyl-acetyl-amino)-5acetylaminomethyl-2,4,6-triiodobenzoic acid and its non-toxic, water-soluble salts with alkali metals and amines are better tolerated by the central nervous system for intracerebral and intracisternal application than X-ray contrast agents available heretofore for cerebral angiography. They are preferentially excreted from the blood by the kidney in a manner to make them useful for urography.
Inventors
- 👤 Ernst Felder
- 👤 Davide Pitre
- 👤 Hans Zutter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:48
CPC Classifications
A; A61; A61K; A61K49/00; A61K49/04; A61K49/0433
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
10 words
A COMPOUND WHICH IS THE 3-(N--B,$DIHYDROXYPROPYLACETYLAMINO)-5ACETYLAMINOMETHYL-2,4,6TRIIODOBENZOIC ACID OF THE FORMULA
Claim 2
Dependent Claim
10 words
A COMPOUND WHICH IS THE 3-(N--B,$DIHYDROXYPROPYLACETYLAMINO)-5ACETYLAMINOMETHYL-2,4,6TRIIODOBENZOIC ACID OF THE FORMULA
Claim 3
Dependent Claim
12 words
A compound as set forth in claim 1 which is said acid.
Claim 4
Dependent Claim
21 words
A compound as set forth in claim 1 which is a salt of said acid with sodium, lithium, or an alkanolamine.
Claim 5
Dependent Claim
31 words
A compound as set forth in claim 1 which is a salt of said acid with an alkanolamine selected from the group consisting of N-methylglucamine, N-methylxylamine, 1-methylamino-2,3-propanediol, monoethanolamine, diethanolamine, and tris-(hydroxymethyl)-aminomethane.
References Cited (Backward Citations)
US3360436A
Cited
US3702866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |