Patent US3914294A successfully refreshed from Google Patents.
US3914294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3,5-Disubstituted-2,4,6-triiodobenzoic acids
Assignee: ER Squibb and Sons LLC
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Filing: 1972-06-01
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Granted: 1975-10-21
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Expires: 1992-06-01
Abstract
Abstract 3,5-Disubstituted-2,4,6-triiodobenzoic acids and derivatives thereof and their methods of preparation are disclosed. In addition, useful compositions containing said compounds and their methods of use are reported.
Inventors
- 👤 Jack Bernstein
- 👤 Francis Alexander Sowinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:48
CPC Classifications
C; C07; C07C; C07C275/00; C07C275/28; C07C275/42; A; A61; A61K; A61K49/00; A61K49/04; A61K49/0433
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
53 words
The compounds of claim 1 wherein R1 is hydrogen, R3 is selected from the group consisting of alkyl of 1 to 6 carbon atoms, 2-hydroxyalkyl of 2 to 6 carbon atoms and 2,3-dihydroxyalkyl of 3 to 6 carbon atoms and R4 is selected from the group consisting of hydrogen and pharmaceutically acceptable salts.
Claim 4
Dependent Claim
10 words
The compound of claim 2 having the name 2,4,6-triiodo-5-methoxy-N-methylisophthalamic acid.
References Cited (Backward Citations)
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US3119858A
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US3145197A
Cited
US3210412A
Cited
US3622616A
Cited
US3701771A
Cited
US3666800A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |