Patent DE206499C successfully refreshed from Google Patents.
Patent US2650222A successfully refreshed from Google Patents.
US2650222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Z-amino-j
Assignee: —
•
Filing: —
•
Granted: 1953-08-25
•
Expires: 1970-08-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:36
CPC Classifications
C; C07; C07D; C07D241/00; C07D241/36; C07D241/38; C07D241/40; C07D241/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
THE PROCESS OF PREPARING 2-AMINO-3,4-DIHYDROQUINOXALINE COMPOUNDS WHICH COMPRISES REACTING A METHANOLIC SOLUTION OF A STRONG BASE WITH THE CORRESPONDING N-(O-AMINOPHENYL)-GLYCINE NITRILE COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
25 words
THE PROCESS OF PREPARING 2-AMINO-3,4-DIHYDROQUINOXALINE COMPOUNDS WHICH COMPRISES REACTING A METHANOLIC SOLUTION OF A STRONG BASE WITH THE CORRESPONDING N-(O-AMINOPHENYL)-GLYCINE NITRILE COMPOUND HAVING THE FORMULA:
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) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |