US3819616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imines/their preparation and their pharmaceutical use
Assignee: Bayer AG
•
Filing: 1971-03-31
•
Granted: 1974-06-25
•
Expires: 1991-03-31
Abstract
Abstract IMINES OF 2-FORMYLQUINOXALINE-3-CARBOXYLIC ACID-1,4-DIOXIDES AND THEIR SALTS ARE OBTAINED THROUGH TREATMENT OF THE LACTONE OR A SALT OF 2-DIHYDROXYMETHYLQUINOXALINEN,N-DIOXIDE-3-CARBOXYLIC ACID WITH A REACTANT BEARING A FREE PRIMARY AMINO GROUP. THE RESULTANT COMPOUNDS AND THEIR NON-TOXIC SALTS ARE ANTIBACTERIAL AGENTS AND CAN BE INCORPORATED IN PHARMACEUTICAL COMPOSITIONS AND FEEDSTUFFS FOR THIS USE. A TYPICAL EMBODIMENT IS 2-(CARBOMETHOXYHYDRAZONOMETHYL)-QUINOXALINE-3-CARBOXYLIC ACID1,4-DIOXIDE.
Inventors
- 👤 F Seng
- 👤 K Ley
- 👤 K Metzger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:31
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/02; C07D277/08; C07D277/12; C07D277/18; A; A23; A23K; A23K20/00; A23K20/10; A23K20/116; A23K20/137; C07D241/00; C07D241/36; C07D241/50; C07D241/52; C07D401/00; C07D401/02; C07D401/12; C07D491/00; C07D491/02; C07D491/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |