US3154540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of lactams
Assignee: —
•
Filing: —
•
Granted: 1964-10-27
•
Expires: 1981-10-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:40
CPC Classifications
C; C07; C07D; C07D225/00; C07D225/02; C07D201/00; C07D201/02; C07D201/04; C07D201/08; C07D201/16; C07D223/00; C07D223/02; C07D223/06; C07D223/08; C07D223/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A PROCESS FOR THE PURIFICATION OF LACTAMS WHICH HAVE BEEN OBTAINED BY REARRANGEMENT OF SUBSTANCES SELECTED FROM THE GROUP CONSISTING OF CYCLOALIPHATIC OXIMES AND THEIR SALTS, SAID SUBSTANCES HAVING BEEN PREPARED BY REACTION OF THE CORRESPONDING SATURATED CYCLOALIPHATIC HYDROCARBONS WITH AN AGENT SELECTED FROM THE GROUP CONSISTING OF NITROSYL CHLORIDE ON THE ONE HAND AND MIXTURES OF NITROGEN MONOXIDE AND CHLORINE ON THE OTHER HAND, WHICH COMPRISES BRINGING A LACTAM OF THE SAID TYPE INTO CONTACT WITH A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM, ALUMINUM, COPPER, ZINC, THE METALS OF THE IRON GROUP OF THE PERIODIC SYSTEM, CHLORIDES OF METALS OF GROUP IIA, OF ALUMINUM AND OF GROUP IIB OF THE PERIODIC SYSTEM, CARBONATES OF GROUP IIA AND GROUP IIB OF THE PERIODIC SYSTEM, AND OXIDES OF ELEMENTS OF GROUP IIIA, GROUP IIB, THE IRON GROUP OF THE PERIODIC SYSTEM AND OF COPPER, AND DISTILLING THE LACTAM.
Claim 2
Dependent Claim
149 words
A PROCESS FOR THE PURIFICATION OF LACTAMS WHICH HAVE BEEN OBTAINED BY REARRANGEMENT OF SUBSTANCES SELECTED FROM THE GROUP CONSISTING OF CYCLOALIPHATIC OXIMES AND THEIR SALTS, SAID SUBSTANCES HAVING BEEN PREPARED BY REACTION OF THE CORRESPONDING SATURATED CYCLOALIPHATIC HYDROCARBONS WITH AN AGENT SELECTED FROM THE GROUP CONSISTING OF NITROSYL CHLORIDE ON THE ONE HAND AND MIXTURES OF NITROGEN MONOXIDE AND CHLORINE ON THE OTHER HAND, WHICH COMPRISES BRINGING A LACTAM OF THE SAID TYPE INTO CONTACT WITH A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM, ALUMINUM, COPPER, ZINC, THE METALS OF THE IRON GROUP OF THE PERIODIC SYSTEM, CHLORIDES OF METALS OF GROUP IIA, OF ALUMINUM AND OF GROUP IIB OF THE PERIODIC SYSTEM, CARBONATES OF GROUP IIA AND GROUP IIB OF THE PERIODIC SYSTEM, AND OXIDES OF ELEMENTS OF GROUP IIIA, GROUP IIB, THE IRON GROUP OF THE PERIODIC SYSTEM AND OF COPPER, AND DISTILLING THE LACTAM.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |