US3159637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of
Assignee: —
•
Filing: —
•
Granted: 1964-12-01
•
Expires: 1981-12-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:09
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/68; C07D211/72; C07D211/74; C07D211/76; C07C; C07C231/00; C07C231/02; C07C231/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
37 words
A PROCESS FOR PREPARING CYCLIC IMIDES COMPRISING REACTING A CARBOXYLIC ACID AMIDE SELECTED FROM THE GROUP CONSISTING OF A,B- AND B,$-MONO-ETHYLENICALLY UNSATURATED ALIPHATIC CARBOXYLIC ACID AMINES OF FROM 3 TO 20 CARBON ATOMS AND OF THE FORMULA
Claim 2
Dependent Claim
37 words
A PROCESS FOR PREPARING CYCLIC IMIDES COMPRISING REACTING A CARBOXYLIC ACID AMIDE SELECTED FROM THE GROUP CONSISTING OF A,B- AND B,$-MONO-ETHYLENICALLY UNSATURATED ALIPHATIC CARBOXYLIC ACID AMINES OF FROM 3 TO 20 CARBON ATOMS AND OF THE FORMULA
Claim 3
Dependent Claim
15 words
A PROCESS ACCORDING TO CLAIM 1 WHEREIN THE UNSATURATED CARBOXYLIC ACID AMIDE IS CROTON AMIDE.
References Cited (Backward Citations)
US2958695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |