US4125599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray contrast agents
Assignee: Mallinckrodt Inc
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Filing: 1976-08-19
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Granted: 1978-11-14
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Expires: 1996-08-19
Abstract
Abstract 5-Gluconamido-2,4,6-triiodo-N-methylisophthalamic acid, 3-acetamido-2,4,6-triiodo-5-trishydroxymethylacetamidobenzoic acid, related compounds and salts and esters thereof are useful as x-ray contrast agents. The corresponding acyl halides are useful as intermediates.
Inventors
- 👤 Philip E. Wiegert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:43
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
46 words
A compound of the formula: ##STR15## wherein X is selected from the group consisting of lower acylamino, N-(lower alkyl)-lower acylamino, N-(hydroxy lower alkyl)-lower acylamino, carbamyl and N-(lower alkyl) carbamyl and Y is gluconamido, and salts thereof with pharmaceutically acceptable cations, and esters thereof with lower alkanols.
Claim 2
Dependent Claim
46 words
A compound of the formula: ##STR15## wherein X is selected from the group consisting of lower acylamino, N-(lower alkyl)-lower acylamino, N-(hydroxy lower alkyl)-lower acylamino, carbamyl and N-(lower alkyl) carbamyl and Y is gluconamido, and salts thereof with pharmaceutically acceptable cations, and esters thereof with lower alkanols.
Claim 3
Dependent Claim
11 words
A compound as defined by claim 1 which is 5-gluconamido-2,4,6-triiodo-N-methylisophthalamic acid.
Claim 4
Dependent Claim
19 words
A compound as defined by claim 1 which is a salt of 5-gluconamido-2,4,6-triiodo-N-methylisophthalamic acid with a pharmaceutically acceptable cation.
Claim 5
Dependent Claim
14 words
A compound as defined by claim 3 wherein the pharmaceutically acceptable cation is sodium.
Claim 6
Dependent Claim
14 words
A compound as defined by claim 3 wherein the pharmaceutically acceptable cation is N-methylglucamine.
Claim 7
Dependent Claim
56 words
An x-ray contrast medium comprising an aqueous solution of an effective amount of a salt of a compound of the formula: ##STR16## wherein X is selected from the group consisting of lower acylamino, N-(lower alkyl)-lower acylamino, N-(hydroxy lower alkyl)-lower acylamino, carbamyl and N-(lower alkyl) carbamyl and Y is gluconamido, with at least one pharmaceutically acceptable cation.
Claim 8
Dependent Claim
56 words
An x-ray contrast medium comprising an aqueous solution of an effective amount of a salt of a compound of the formula: ##STR16## wherein X is selected from the group consisting of lower acylamino, N-(lower alkyl)-lower acylamino, N-(hydroxy lower alkyl)-lower acylamino, carbamyl and N-(lower alkyl) carbamyl and Y is gluconamido, with at least one pharmaceutically acceptable cation.
Claim 9
Dependent Claim
15 words
An x-ray contrast medium as defined by claim 6 wherein said compound is 5-gluconamido-2,4,6-triiodo-N-methylisophthalamic acid.
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) | 1981-11-13 | 1982-05-15 | 1982-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-13 | 1986-05-15 | 1986-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-13 | 1990-05-15 | 1990-11-14 | $7700.00 | Window Closed / Lapsed |