Patent US2811557A successfully refreshed from Google Patents.
US2811557A
Expired / Lapsed
US
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Process for the manufacture of alkanolamines
Assignee: Distillers Co Yeast Ltd
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Filing: 1956-02-13
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Granted: 1957-10-29
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Expires: 1976-02-13
Abstract
No abstract record available.
Inventors
- 👤 Graham Archibald Robert
- 👤 Millidge Alfred Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:12
CPC Classifications
C; C07; C07C; C07C215/00; C07C215/02; C07C215/04; C07C215/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS WHICH COMPRISES REACTING 2:3-EPOXY BUTANE WHICH IS SUBSTANTIALLY FREE OF 1:2-EPOXYBUTANE AND OTHER EPOXY COMPOUNDS WITH AMMONIA IN THE PROPORTION OF ABOUT 2.5 MOLES TO 10 MOLES OF AMMONIA TO ONE MOLE OF 2:3-EPOXYBUTANE AT A TEMPERATURE OF ABOUT 70-180*C. FOR A PERIOD NOT EXCEEDING ABOUT FOUR HOURS TO PRODUCE PRINCIPALLY MONO-BUTANOLAMINE AND DI-BUTANOLAMINE IN PROPORTIONS OF AT LEAST TWO PARTS OF MONO-BUTANOLAMINE TO ONE PART OF DI-BUTANOLAMINE, WITH NO TRI-BUTANOLAMINE.
Claim 2
Dependent Claim
73 words
A PROCESS WHICH COMPRISES REACTING 2:3-EPOXY BUTANE WHICH IS SUBSTANTIALLY FREE OF 1:2-EPOXYBUTANE AND OTHER EPOXY COMPOUNDS WITH AMMONIA IN THE PROPORTION OF ABOUT 2.5 MOLES TO 10 MOLES OF AMMONIA TO ONE MOLE OF 2:3-EPOXYBUTANE AT A TEMPERATURE OF ABOUT 70-180*C. FOR A PERIOD NOT EXCEEDING ABOUT FOUR HOURS TO PRODUCE PRINCIPALLY MONO-BUTANOLAMINE AND DI-BUTANOLAMINE IN PROPORTIONS OF AT LEAST TWO PARTS OF MONO-BUTANOLAMINE TO ONE PART OF DI-BUTANOLAMINE, WITH NO TRI-BUTANOLAMINE.
References Cited (Backward Citations)
US2281177A
Cited
US2662097A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |