US3721701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiopaque triiodoalkylureido benzoic acids
Assignee: ER Squibb and Sons LLC
•
Filing: 1970-06-19
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Granted: 1973-03-20
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Expires: 1990-06-19
Abstract
Abstract COMPOUNDS HAVING THE FORMULA 2,4,6-TRI(I),3-(R1-N(-R2)-CO-N(-R)-),5-(R2-CO-N(-R)-) BENZOIC ACID WHEREIN R AND R1 ARE HYDROGEN OR LOWER ALKYL AND R2 IS LOWER ALKYL, AS WELL AS SALTS AND LOWER ALKYL ESTERS OF THESE COMPOUNDS ARE USEFUL AS DIAGNOSTIC AGENTS.
Inventors
- 👤 J Bernstein
- 👤 K Losee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:17
CPC Classifications
C; C07; C07C; C07C275/00; C07C275/28; C07C275/42
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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |