US2790820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of n
Assignee: —
•
Filing: —
•
Granted: 1957-04-30
•
Expires: 1974-04-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:45
CPC Classifications
C; C07; C07C; C07C255/00; C07C255/01; C07C255/24; C07C255/29; C07C253/00; C07C253/30; C07C255/19; C07C255/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
ESTERS OF N,N-BS(2-CYANOETHY) CARBOXAMIC ACIDS HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
9 words
ESTERS OF N,N-BS(2-CYANOETHY) CARBOXAMIC ACIDS HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2462835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |