US3676453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxazole and oxazol-5-one derivatives
Assignee: Merck and Co Inc
•
Filing: 1968-11-07
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Granted: 1972-07-11
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Expires: 1988-11-07
Abstract
Abstract 5-(dibenzyloxybenzoyloxy)-4-lower alkyl-2-substituted-oxazoles and 4-(dibenzyloxybenzoyl)-4-lower alkyl-2-substituted-oxazol-5ones which are useful as intermediates.
Inventors
- 👤 Seemon H Pines
- 👤 Meyer Sietzinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:29
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/02; C07D263/30; C07D263/34; C07D263/36; C07D263/42
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
10 words
The compound (A) of claim 1 wherein R2 is methyl.
Claim 2
Dependent Claim
10 words
The compound (A) of claim 1 wherein R4 is phenyl.
Claim 3
Dependent Claim
10 words
The compound (B) of claim 1 wherein R2 is methyl.
Claim 4
Dependent Claim
10 words
The compound (B) of claim 1 wherein R4 is phenyl.
References Cited (Backward Citations)
US2917544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |