US3013064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of lower alkyl carbamates
Assignee: Berkeley Chemical Corp
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Filing: 1960-03-10
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Granted: 1961-12-12
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Expires: 1980-03-10
Abstract
No abstract record available.
Inventors
- 👤 Beinfest Sidney
- 👤 Halpern Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:23
CPC Classifications
C; C07; C07C; C07C271/00; C07C271/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN A PROCESS FOR PREPARING A LOWER ALKYL CARBAMATE BY REACTING A C1-C2 ALKANOL WITH UREA AT A TEMPERATURE IN THE RANGE OF 130 TO 155*C. AND A PRESSURE IN THE RANGE OF 3 TO 10 ATMOSPHERES WHEREIN EFFLUENT VAPORS ARE WITHDRAWN FROM THE REACTION ZONE AND GIVE RISE TO CONDENSATION DEPOSITS WHICH CAUSE PLUGGING IN THE WITHDRAWAL LINE THE IMPROVED METHOD OF PREVENTING THE PLUGGING WHICH COMPRISES MAINTAINING THE WITHDRAWAL LINE AT A MININUM TEMPERATURE IN THE RANGE OF 58-80*C.
Claim 2
Dependent Claim
81 words
IN A PROCESS FOR PREPARING A LOWER ALKYL CARBAMATE BY REACTING A C1-C2 ALKANOL WITH UREA AT A TEMPERATURE IN THE RANGE OF 130 TO 155*C. AND A PRESSURE IN THE RANGE OF 3 TO 10 ATMOSPHERES WHEREIN EFFLUENT VAPORS ARE WITHDRAWN FROM THE REACTION ZONE AND GIVE RISE TO CONDENSATION DEPOSITS WHICH CAUSE PLUGGING IN THE WITHDRAWAL LINE THE IMPROVED METHOD OF PREVENTING THE PLUGGING WHICH COMPRISES MAINTAINING THE WITHDRAWAL LINE AT A MININUM TEMPERATURE IN THE RANGE OF 58-80*C.
References Cited (Backward Citations)
US2837561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |