US2518264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing imidazolidones
Assignee: Wyeth Holdings LLC
•
Filing: 1946-01-23
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Granted: 1950-08-08
•
Expires: 1966-01-23
Abstract
No abstract record available.
Inventors
- 👤 Abramovitch Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:13
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/04; C07D233/28; C07D233/44; C07D233/46; C07D233/30; C07D233/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A METHOD OF PREPARING 1-SUBSTITUTED IMIDAZOLIDONES-2 WHERE SAID 1-SUBSTITUENT IS A RADICAL SELECTED FROMT HE GROUP CONSISTING OF ALIPHATIC, CYCLOALIPHIC, ARALIPHATIC, ARYL AND ALPHARYL, WHICH COMPRISES HEATING A 2-IMINO-3-SUBSTITUTED OXAZOLIDINE, WHERE SAID 3-SUBSTITUENT IS SELECTED FROM THE AFORESAID GROUP, UNDER ANHYDROUS CONDITIONS TO A TEMPERATURE ABOVE SUBSTANTIALLY 135*C., AND RECOVERING THE RESULTANT IMIDAZOLIDONE.
Claim 2
Independent Claim
53 words
A METHOD OF PREPARING 1-SUBSTITUTED IMIDAZOLIDONES-2 WHERE SAID 1-SUBSTITUENT IS A RADICAL SELECTED FROMT HE GROUP CONSISTING OF ALIPHATIC, CYCLOALIPHIC, ARALIPHATIC, ARYL AND ALPHARYL, WHICH COMPRISES HEATING A 2-IMINO-3-SUBSTITUTED OXAZOLIDINE, WHERE SAID 3-SUBSTITUENT IS SELECTED FROM THE AFORESAID GROUP, UNDER ANHYDROUS CONDITIONS TO A TEMPERATURE ABOVE SUBSTANTIALLY 135*C., AND RECOVERING THE RESULTANT IMIDAZOLIDONE.
References Cited (Backward Citations)
US2027031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |