US2662097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation process
Assignee: Ethyl Corp
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Filing: 1951-10-30
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Granted: 1953-12-08
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Expires: 1971-10-30
Abstract
No abstract record available.
Inventors
- 👤 Franklin H Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:29
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/24; C07C; C07C213/00; C07C213/02; C07C217/00; C07C217/02; C07C217/04; C07C217/06; C07C217/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
THE IMPROVEMENT IN THE PROCESS OF INTERREACTING A 1,2-EPOXIDE WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF PRIMARY AND SECONDARY AMINES TO PRODUCE AN ETHANOLAMINE WHICH COMPRISES CONDUCTING THE REACTION IN A LOWER ALIPHATIC ALCOHOL SOLVENT AT A TEMPERATURE BETWEEN ABOUT 20 TO 50* C. AND IN THE PRESENCE OF A CATALYTIC QUANTITY OF A CARBOCYCLIC ARYL ACETYLENE.
Claim 2
Dependent Claim
59 words
THE IMPROVEMENT IN THE PROCESS OF INTERREACTING A 1,2-EPOXIDE WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF PRIMARY AND SECONDARY AMINES TO PRODUCE AN ETHANOLAMINE WHICH COMPRISES CONDUCTING THE REACTION IN A LOWER ALIPHATIC ALCOHOL SOLVENT AT A TEMPERATURE BETWEEN ABOUT 20 TO 50* C. AND IN THE PRESENCE OF A CATALYTIC QUANTITY OF A CARBOCYCLIC ARYL ACETYLENE.
References Cited (Backward Citations)
US2003386A
Cited
FR702553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |