US2654758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted ethylenediamine derivatives
Assignee: Merck Sharp & Dohme LLC
•
Filing: 1948-08-30
•
Granted: 1953-10-06
•
Expires: 1968-08-30
Abstract
No abstract record available.
Inventors
- 👤 Papa Domenick
- 👤 Villani Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:59
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/81
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
COMPOUNDS OF THE GROUP CONSISTING OF BASES OF THE FORMULA
Claim 2
Dependent Claim
10 words
COMPOUNDS OF THE GROUP CONSISTING OF BASES OF THE FORMULA
References Cited (Backward Citations)
US1737458A
Cited
US1886481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |