US2750401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ester of nu, nu-bis(2-cyanoethyl) carboxamic acids
Assignee: Union Carbide Corp
•
Filing: 1953-04-22
•
Granted: 1956-06-12
•
Expires: 1973-04-22
Abstract
No abstract record available.
Inventors
- 👤 Lynn John Wendell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:08
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/315
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
ESTERS OF N,N-BIS(2-CYANOETHYL) CARBOXAMIC ACIDS HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
9 words
ESTERS OF N,N-BIS(2-CYANOETHYL) CARBOXAMIC ACIDS HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2462835A
Cited
US2478299A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |