US2866785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preconcentrating
Assignee: —
•
Filing: —
•
Granted: 1958-12-30
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Expires: 1975-12-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:40
CPC Classifications
C; C07; C07D; C07D201/00; C07D201/16; C07D201/02; C07D201/04; C07D223/00; C07D223/02; C07D223/06; C07D223/08; C07D223/10; C07D225/00; C07D225/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
52 words
A PROCESS FOR THE PRECONCENTRATION OF WATER-CONTAINING LACTAM OIL OBTAINED BY THE BECKMANN REARRANGEMENT OF OXIMES OF CYCLIC KETONES AND SUBSEQUENT NEUTRALIZATION, COMPRISING THE STEP OF PASSING A STREAM OF AIR THROUGH SAID WATER-CONTAINING OIL AT ELEVATED TEMPERATURE UNTIL THE WATER CONTENT OF SAID OIL HAS BEEN REDUCED TO A PREDETERMINED VALUE.
Claim 2
Dependent Claim
52 words
A PROCESS FOR THE PRECONCENTRATION OF WATER-CONTAINING LACTAM OIL OBTAINED BY THE BECKMANN REARRANGEMENT OF OXIMES OF CYCLIC KETONES AND SUBSEQUENT NEUTRALIZATION, COMPRISING THE STEP OF PASSING A STREAM OF AIR THROUGH SAID WATER-CONTAINING OIL AT ELEVATED TEMPERATURE UNTIL THE WATER CONTENT OF SAID OIL HAS BEEN REDUCED TO A PREDETERMINED VALUE.
Claim 3
Dependent Claim
125 words
A PROCESS FOR RECOVERING A LACTAM FROM A WATERCONTAINING LACTAM OIL OBTAINED BY THE BECKMANN REAR RANGEMENT OF AN OXIME OF A CYCLIC KETONE, THE SUBSEQUENT NEUTRALIZATION AND THE EXTRACTION OF SAID WATER CONTAINING LACTAM OIL WITH A CHLORINATED HYDROCARBON SOLVENT, THE IMPROVEMENT WHICH COMPRISES ASSING A STREAM OF A GAS SELECTED FROM THE CLASS CONSISTING OF A MOLECULAR OXYGEN CONTAINING GAS AND NITROGEN THROUGH SAID WATER CONTAINNG LACTAM OIL AT ELEVATED TEMPERATURES UNTIL THE WATER CONTENT THEREOF IS REDUCED TO A PREDETERMINED VALUE, THE TREATMENT WITH SAID GAS STREAM BEING EFFECTED PRIOR TO THE EXTRACTION WITH SAID CHLORINATED HYCROCARBON, WHEREBY THE FORMATION OF EMULSIONS DURING SAID EXTRACTION STEP IN AVOIDED AND THE PERMANGANATE NUMBER OF SAID LACTAM IS RAISED TO A RELATIVELY HIGH VALUE.
Claim 4
Dependent Claim
125 words
A PROCESS FOR RECOVERING A LACTAM FROM A WATERCONTAINING LACTAM OIL OBTAINED BY THE BECKMANN REAR RANGEMENT OF AN OXIME OF A CYCLIC KETONE, THE SUBSEQUENT NEUTRALIZATION AND THE EXTRACTION OF SAID WATER CONTAINING LACTAM OIL WITH A CHLORINATED HYDROCARBON SOLVENT, THE IMPROVEMENT WHICH COMPRISES ASSING A STREAM OF A GAS SELECTED FROM THE CLASS CONSISTING OF A MOLECULAR OXYGEN CONTAINING GAS AND NITROGEN THROUGH SAID WATER CONTAINNG LACTAM OIL AT ELEVATED TEMPERATURES UNTIL THE WATER CONTENT THEREOF IS REDUCED TO A PREDETERMINED VALUE, THE TREATMENT WITH SAID GAS STREAM BEING EFFECTED PRIOR TO THE EXTRACTION WITH SAID CHLORINATED HYCROCARBON, WHEREBY THE FORMATION OF EMULSIONS DURING SAID EXTRACTION STEP IN AVOIDED AND THE PERMANGANATE NUMBER OF SAID LACTAM IS RAISED TO A RELATIVELY HIGH VALUE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-29 | 1962-06-30 | 1962-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-29 | 1966-06-30 | 1966-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-29 | 1970-06-30 | 1970-12-30 | $7700.00 | Window Closed / Lapsed |