Patent US2520093A successfully refreshed from Google Patents.
US2520093A
Expired / Lapsed
US
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Manufacture of 3-dialkylamino-2-hydroxy-propyl amines
Assignee: Sharples Chemicals Inc
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Filing: 1946-07-26
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Granted: 1950-08-22
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Expires: 1966-07-26
Abstract
No abstract record available.
Inventors
- 👤 Gross Walter Dale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:29
CPC Classifications
C; C07; C07C; C07C213/00; C07C213/08; C07C213/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS COMPRISING REACTING WITH EPICHLORHYDRIN A COMPOUND OF THE GROUP CONSISTING OF SECONDARY ALKYL AMINES HAVING LESS THAN 7 CARBON ATOMS IN EACH ALKYL RADICAL AND PIPERIDINE, TREATING THE REACTION MIXTURE WITH AN AQUEOUS SOLUTION OF A INORGANIC BASE TO FORM A PLURALITY OF PHASES INCLUDING AN OIL PHASE, SEPARATING SAID OIL PHASE, AND THEREAFTER TREATING SAID OIL PHASE WITH AN EXCESS OF AMMONIA AT A TEMPPERATURE BETWEEN 50*C. AND 150*C. TO FORM THE DESIRED PRODUCT.
Claim 2
Dependent Claim
77 words
A PROCESS COMPRISING REACTING WITH EPICHLORHYDRIN A COMPOUND OF THE GROUP CONSISTING OF SECONDARY ALKYL AMINES HAVING LESS THAN 7 CARBON ATOMS IN EACH ALKYL RADICAL AND PIPERIDINE, TREATING THE REACTION MIXTURE WITH AN AQUEOUS SOLUTION OF A INORGANIC BASE TO FORM A PLURALITY OF PHASES INCLUDING AN OIL PHASE, SEPARATING SAID OIL PHASE, AND THEREAFTER TREATING SAID OIL PHASE WITH AN EXCESS OF AMMONIA AT A TEMPPERATURE BETWEEN 50*C. AND 150*C. TO FORM THE DESIRED PRODUCT.
References Cited (Backward Citations)
US1790042A
Cited
US1985885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |