US3393199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing unsaturated 6-membered lactams
Assignee: Dynamit Nobel AG
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Filing: 1966-09-19
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Granted: 1968-07-16
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Expires: 1986-09-19
Abstract
No abstract record available.
Inventors
- 👤 Gerhard Daum
- 👤 Rudolf Modic
- 👤 Hermann Richtzenhain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:17
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/20; C07D215/22; C07D215/227; C07D201/00; C07D201/02; C07D201/08; C07D211/00; C07D211/04; C07D211/80; C07D211/84; C07D211/86
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
10 words
AN UNSATURATED 6-MEMBERED LACTAM SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
10 words
AN UNSATURATED 6-MEMBERED LACTAM SELECTED FROM THE GROUP CONSISTING OF
Claim 3
Dependent Claim
36 words
THE PROCESS FOR PRODUCING 2-OXO-5,5-DI-(B-CYANETHYL) - 6 - METHYL-2,3,4,5-TETRAHYDROPYRIDINE WHICH COMPRISES HEATING A,A,A-TRI(B-CYANETHYL)-ACETONE IN THE PRESENCE OF A SOLUTION OF SODIUM IN ETHANOL AT A TEMPERATURE WITHIN THE RANGE OF 50-200*C. AND RECOVERING THE LACTAM FORMED.
Claim 4
Dependent Claim
36 words
THE PROCESS FOR PRODUCING 2-OXO-5,5-DI-(B-CYANETHYL) - 6 - METHYL-2,3,4,5-TETRAHYDROPYRIDINE WHICH COMPRISES HEATING A,A,A-TRI(B-CYANETHYL)-ACETONE IN THE PRESENCE OF A SOLUTION OF SODIUM IN ETHANOL AT A TEMPERATURE WITHIN THE RANGE OF 50-200*C. AND RECOVERING THE LACTAM FORMED.
References Cited (Backward Citations)
DE1092919B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |