US2537871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-aminoquinoxaline and process of preparing same
Assignee: Merck and Co Inc
•
Filing: 1950-02-18
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Granted: 1951-01-09
•
Expires: 1970-02-18
Abstract
No abstract record available.
Inventors
- 👤 Frank J Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:21
CPC Classifications
C; C07; C07D; C07D241/00; C07D241/36; C07D241/38; C07D241/40; C07D241/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
THE PROCESS THAT COMPRISES REACTING A 2HALOQUINOXALINE OF THE CLASS CONSISTING OF 2CHLOROQUINOXALINE AND 2-BROMOQUINOXALINE WITH AMMONIA, AND RECOVERING THE 2-AMINOQUINOXALINE THUS FORMED.
Claim 2
Dependent Claim
23 words
THE PROCESS THAT COMPRISES REACTING A 2HALOQUINOXALINE OF THE CLASS CONSISTING OF 2CHLOROQUINOXALINE AND 2-BROMOQUINOXALINE WITH AMMONIA, AND RECOVERING THE 2-AMINOQUINOXALINE THUS FORMED.
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) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |