Patent US3013065A successfully refreshed from Google Patents.
US3013065A
Expired / Lapsed
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Preparation of lower alkyl carbamates with interrupted effluent flow
Assignee: Berkeley Chemical Corp
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Filing: 1960-06-03
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Granted: 1961-12-12
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Expires: 1980-06-03
Abstract
No abstract record available.
Inventors
- 👤 Beinfest Sidney
- 👤 Halpern Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:24
CPC Classifications
C; C07; C07C; C07C271/00; C07C271/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN A PROCESS FOR PREPARING A LOWER ALKYL CARBAMATE BY REACTING A C1-C2 ALKANOL WITH UREA WHEREIN ALKANOL CONTAINING EFFLUENT VAPORS ARE WITHDRAWN FROM THE REACTION ZONE, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF COOLING THE EFFLUENT VAPORS TO CONDENSE THE ALKANOL IN A FIRST HEAT EXCHANGE ZONE, INTERRUPTING THE FLOW OF ADDITIONAL EFFLUENT VAPORS TO THE FIRST HEAT EXCHANGE ZONE, SENDING ADDITIONAL EFFLUENT VAPORS TO A SECOND HEAT EXCHANGE ZONE WHEREIN THEY ARE COOLED TO CONDENSE THE ALKANOL, VENTING UNCONDENSED GASES AND RETURNING THE CONDENSED ALKANOL TO THE REACTION ZONE.
Claim 2
Dependent Claim
91 words
IN A PROCESS FOR PREPARING A LOWER ALKYL CARBAMATE BY REACTING A C1-C2 ALKANOL WITH UREA WHEREIN ALKANOL CONTAINING EFFLUENT VAPORS ARE WITHDRAWN FROM THE REACTION ZONE, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF COOLING THE EFFLUENT VAPORS TO CONDENSE THE ALKANOL IN A FIRST HEAT EXCHANGE ZONE, INTERRUPTING THE FLOW OF ADDITIONAL EFFLUENT VAPORS TO THE FIRST HEAT EXCHANGE ZONE, SENDING ADDITIONAL EFFLUENT VAPORS TO A SECOND HEAT EXCHANGE ZONE WHEREIN THEY ARE COOLED TO CONDENSE THE ALKANOL, VENTING UNCONDENSED GASES AND RETURNING THE CONDENSED ALKANOL TO THE REACTION ZONE.
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 |