US2891058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of n-vinyl cyclic amides, carbamates, and lactams
Assignee: Dow Chemical Co
•
Filing: 1958-06-02
•
Granted: 1959-06-16
•
Expires: 1978-06-02
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm E Walles
- 👤 William F Tousignant
- 👤 Jr Thomas Houtman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:14
CPC Classifications
C; C07; C07D; C07D265/00; C07D265/04; C07D265/06; C07D265/08; C07D265/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
30 words
METHOD FOR THE PREPARATION OF MONOETHYLENICALLY UNSATURATED N-HETEROCYCLIC MONOMERIC COMPOUNDS SELECTED FROM THE GROUP OF N-VINYL CYCLIC AMIDES AND N-VINYL CYCLIC CARBAMATES WHICH CONSISTS OF THOSE HAVING THE STRUCTURAL FORMULAE:
Claim 2
Dependent Claim
30 words
METHOD FOR THE PREPARATION OF MONOETHYLENICALLY UNSATURATED N-HETEROCYCLIC MONOMERIC COMPOUNDS SELECTED FROM THE GROUP OF N-VINYL CYCLIC AMIDES AND N-VINYL CYCLIC CARBAMATES WHICH CONSISTS OF THOSE HAVING THE STRUCTURAL FORMULAE:
Claim 3
Dependent Claim
17 words
THE METHOD OF CLAIM 1, WHEREIN SAID STARTING MATERIAL IS EPSILON-CAPROLACTAM AND SAID MONOMERIC PRODUCT IS N-VINYL-2-CAPROLACTAM.
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) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |