US3812151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beta-(2,4,6-triiodo-3-acetamidinophenyl)-propionic acids
Assignee: Bayer Pharma AG
•
Filing: 1970-11-06
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Granted: 1974-05-21
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Expires: 1990-11-06
Abstract
Abstract AMIDINES OF THE FORMULA 1,3,5-TRI(I-),2-(HOOC-CH(-R1)-CH2-),4-(R3-N(-R4)-C(-R2)= N-)BENZENE WHEREIN R1 IS HYDROGEN OR LOWER ALKYL, R2 IS LOWER ALKYL, AND R3 AND R4, WHICH CAN BE ALIKE OR DIFFERENT, EACH IS A HYDROGEN ATOM OR LOWER ALLKYL, OR COLLECTIVELY WITH THE NITROGEN ATOM TO WHICH THEY ARE ATTACHED, A HETEROCYCLIC RING CONTAINING 0-1 ADDITIONAL HETERO ATOMS SELECTED FROM OXYGEN AND NITROGEN, INCLUDING THE PHYSIOLOGICALLY ACCEPTABLE SALTS THEREOF, ARE USEFUL AS RADIOPAQUE AGENT.
Inventors
- 👤 H Pfeiffer
- 👤 P Schulze
- 👤 K Kolb
- 👤 A Harwart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:38
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/18; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/55
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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |