Patent US2520280A successfully refreshed from Google Patents.
US2520280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitbile substituted dithiocar
Assignee: —
•
Filing: —
•
Granted: 1950-08-29
•
Expires: 1967-08-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:50
CPC Classifications
C; C07; C07F; C07F3/00; C07F3/06; C07C; C07C333/00; C07C333/14; C07C333/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A SALT OF ETHYLENE-BIS-(N-2-CYANO ETHYL DITHIOCARBAMIC ACID).
Claim 2
Dependent Claim
7 words
A SALT OF ETHYLENE-BIS-(N-2-CYANO ETHYL DITHIOCARBAMIC ACID).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |