US2844589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of belta2-oxazoline
Assignee: Union Carbide Corp
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Filing: 1953-06-05
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Granted: 1958-07-22
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Expires: 1973-06-05
Abstract
No abstract record available.
Inventors
- 👤 Lawrence G Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:03
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/02; C07D263/08; C07D263/10; C07D263/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PROCESS FOR THE PREPARATION OF $2-OXAZOLINE WHICH COMPRISES HEATING N-(2-HYDROXYETHYL FORMAMIDE AT AN ELEVATED TEMPERATURE IN THE RANGE 150*C. TO 250*C. UNDER REDUCED PRESSURES IN THE PRESENCE OF A DEHYDRATING AGENT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM OXIDE, IRON OXIDE, SULFURIC ACID AND DIATOMACEOUS EARTH AND RECOVERING THE $2-OXAZOLINE THUS PRODUCED.
Claim 2
Dependent Claim
53 words
A PROCESS FOR THE PREPARATION OF $2-OXAZOLINE WHICH COMPRISES HEATING N-(2-HYDROXYETHYL FORMAMIDE AT AN ELEVATED TEMPERATURE IN THE RANGE 150*C. TO 250*C. UNDER REDUCED PRESSURES IN THE PRESENCE OF A DEHYDRATING AGENT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM OXIDE, IRON OXIDE, SULFURIC ACID AND DIATOMACEOUS EARTH AND RECOVERING THE $2-OXAZOLINE THUS PRODUCED.
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) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |