US3853965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anilic acids of 3-substituted 2,4,6-triiodoanilines
Assignee: STWB Inc
•
Filing: 1973-08-13
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Granted: 1974-12-10
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Expires: 1993-08-13
Abstract
Abstract Cyclic imides and anilic acids of 2,4,6-triiodoanilines bearing a substituted amino group in the 3-position are prepared by decarboxylation of the corresponding compounds bearing a carboxyl group in the 5-position. The products are useful as intermediates and as cholecystographic agents.
Inventors
- 👤 J Ackerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:51
CPC Classifications
C; C07; C07D; C07D265/00; C07D265/28; C07D265/30; C07D265/32; C07D265/33; C07D207/00; C07D207/02; C07D207/30; C07D207/34; C07D207/36; C07D207/40; C07D207/44
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
4 words
COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
4 words
COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
14 words
A compound according to claim 1 wherein R is (lower-alkanoyl)N(lower-alkyl) and R'''' is hydrogen.
Claim 4
Dependent Claim
7 words
(N-Methyl-N-(2,4,6-triiodo-3-(N-methylacetamido) -phenyl)carbamoylmethylthio)acetic acid, according to claim 2.
Claim 5
Dependent Claim
7 words
(N-(2,4,6-Triiodo-3-(N-methylacetamido)phenyl) -carbamoylmethylsulfonyl)acetic acid, according to claim 2.
Claim 6
Dependent Claim
6 words
2'',4'',6''-Triiodo-3''-(N-methylacetamido)diglycolanilic acid, according to claim 2.
Claim 7
Dependent Claim
6 words
2'',4'',6''-Triiodo-3''-(N-methylacetamido)-N-methyldiglycolanilic acid, according to claim 2.
References Cited (Backward Citations)
US3359278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |