US2812333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of 1-(2-hydroxyethyl) imidazolidine-2
Assignee: Union Carbide Corp
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Filing: 1954-09-27
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Granted: 1957-11-05
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Expires: 1974-09-27
Abstract
No abstract record available.
Inventors
- 👤 Arthur B Steele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:52
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PROCESS FOR THE PREPARATION OF 1-(2-HYDROXYETHYL) IMIDAZOLIDONE-2 WHICH COMPRISES REACTING 2-AMINOETHANOL AND CARBON DIOXIDE AND HEATING AT AN ELEVATED TEMPERATURE IN THE RANGE OF FROM 135*C. TO 165*C. UNDER A SUPERATMOSPHERIC PRESSURE IN THE RANGE OF FROM 200 TO 600 POUNDS PER SQUARE INCH ABSOLUTE.
Claim 2
Dependent Claim
46 words
A PROCESS FOR THE PREPARATION OF 1-(2-HYDROXYETHYL) IMIDAZOLIDONE-2 WHICH COMPRISES REACTING 2-AMINOETHANOL AND CARBON DIOXIDE AND HEATING AT AN ELEVATED TEMPERATURE IN THE RANGE OF FROM 135*C. TO 165*C. UNDER A SUPERATMOSPHERIC PRESSURE IN THE RANGE OF FROM 200 TO 600 POUNDS PER SQUARE INCH ABSOLUTE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |