US2649458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-thiono-5-oxazolidones
Assignee: Monsanto Chemicals Ltd
•
Filing: 1951-04-30
•
Granted: 1953-08-18
•
Expires: 1971-04-30
Abstract
No abstract record available.
Inventors
- 👤 George E Bennett
- 👤 John B Ott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:52
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/02; C07D263/30; C07D263/34; C07D263/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
AS A NEW CHEMICAL COMPOUND, THE AMINO ACID DERIVATIVE HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
13 words
AS A NEW CHEMICAL COMPOUND, THE AMINO ACID DERIVATIVE HAVING THE STRUCTURAL 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) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |