US2618658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2,2-dimethyl-3-hydroxypropylamine and process for its preparation
Assignee: Eastman Kodak Co
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Filing: 1949-06-08
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Granted: 1952-11-18
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Expires: 1969-06-08
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:43
CPC Classifications
C; C07; C07C; C07C215/00; C07C215/02; C07C215/04; C07C215/06; C07C215/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
77 words
A PROCESS FOR PREPARING 2,2-DIMETHYL-3HYDROXYPROPYLAMINE WHICH COMPRISES HYDROGENATING A MIXTURE OF 2,2-DIMETHYL-3-HYDROXY PROPIONALDEHYDE AND AMMONIA, IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF METHYL ALCOHOL, ETHYL ALCOHOL, AND ISOPROPYL ETHER, AT A PRESSURE OF FROM 1,000 TO 2,000 POUNDS PER SQUARE INCH AND AT A TEMPERATURE OF FROM 50* TO 100* C., AND IN THE PRESENCE OF A RANEY NICKEL HYDROGENATION CATALYST, THE MOLAR RATIO OF THE ALDEHYDE TO THE AMMONIA BEING FROM 1:2 TO 1:4.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |