US3019218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for amination of alpha-halo-
Assignee: —
•
Filing: —
•
Granted: 1962-01-30
•
Expires: 1979-01-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:07
CPC Classifications
C; C07; C07D; C07D223/00; C07D223/02; C07D223/06; C07D223/12; C07D201/00; C07D201/02; C07D201/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
IN THE METHOD FOR PREPARATION OF ALPHA-AMINOEPSILON-CAPROLACTAM WHEREIN AN ALPHA-HALO-EPSILON-CAPROLACTAM IS REACTED WITH AMMONIA UNDER LIQUID REACTION CONDITIONS, THE IMPROVEMENT WHICH COMPRISES CONDUCTING SAID REACTION IN THE PRESENCE OF AN AMMONIUM ION SCAVENGER WHICH REACTS WITH AMMONIUM IONS TO FORM AN AMMONIAINSOLUBLE AMMONIUM COMPOUND, SO THAT THE AMMONIUM IONS ARE REMOVED FROM SAID LIQUID REACTION SOLUTION AS THEY ARE FORMED THEREBY MINIMIZING PIPERIDINE-2-CARBOXAMIDE FORMATION.
Claim 2
Dependent Claim
64 words
IN THE METHOD FOR PREPARATION OF ALPHA-AMINOEPSILON-CAPROLACTAM WHEREIN AN ALPHA-HALO-EPSILON-CAPROLACTAM IS REACTED WITH AMMONIA UNDER LIQUID REACTION CONDITIONS, THE IMPROVEMENT WHICH COMPRISES CONDUCTING SAID REACTION IN THE PRESENCE OF AN AMMONIUM ION SCAVENGER WHICH REACTS WITH AMMONIUM IONS TO FORM AN AMMONIAINSOLUBLE AMMONIUM COMPOUND, SO THAT THE AMMONIUM IONS ARE REMOVED FROM SAID LIQUID REACTION SOLUTION AS THEY ARE FORMED THEREBY MINIMIZING PIPERIDINE-2-CARBOXAMIDE FORMATION.
References Cited (Backward Citations)
US2876218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |