US2772281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of 4-amino-3-isoxazolidone and its derivatives
Assignee: Merck and Co Inc
•
Filing: 1954-12-23
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Granted: 1956-11-27
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Expires: 1974-12-23
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Holly
- 👤 Charles H Stammer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:25
CPC Classifications
C; C07; C07D; C07D261/00; C07D261/02; C07D261/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
12 words
THE PROCESS WHICH COMPRISES REACTING A 4-CARBOALKOXY-2-OXAZOLIDONE COMPOUND HAVING THE GENERAL FORMULA-
Claim 2
Dependent Claim
5 words
COMPOUNDS HAVING THE GENERAL FORMULA-
Claim 3
Dependent Claim
5 words
COMPOUNDS HAVING THE GENERAL FORMULA-
References Cited (Backward Citations)
GB715362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |