US3814756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of 1,2-dihydro-2-oxo-4-aminopyrimido(4,5-b)quinoxaline-5,10-microndioxides
Assignee: Bayer AG
•
Filing: 1972-05-02
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Granted: 1974-06-04
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Expires: 1992-05-02
Abstract
Abstract 1,2-DIHYDRO-2-PXO-4-AMINOPYRIMIDO 4,5-B!QUINOXZLINE5,10-DIOXIDES DEMONSTRATE ANTIMICROBIAL ACTIVITY AN CAN BE USED AS SUCH OR IN COMPOSITIONS FOR COMBATTING INFECTIONS AND IN IMPROVING FEED EFFECIENCY. THE COMPOUNDS, OF WHICH 1,2-DIHYDRO-2-OXO-4-DIMETHYLAMINOPYRIMIDO 4,5-B! QUINOXZLINE-5,10-DIOXIDE IS A TYPICAL EMBODIMENT, ARE PREPARED FROM THE APPROPRIATE 3-AMINOQUINOXALINE-1,4DIOXIDE-2-AMIDINE AND PHOSGENE OR AN ALKYL CHLOROFORMATE FOLLOWED BY TREATMENT WITH BASE.
Inventors
- 👤 K Metzger
- 👤 F Seng
- 👤 K Ley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:02
CPC Classifications
C; C07; C07D; C07D475/00; C07D475/06; A; A23; A23K; A23K20/00; A23K20/10; A23K20/116
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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |