US2788356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1, 1, 2, 2-tetracyanoethane and preparation thereof
Assignee: EIDP Inc
•
Filing: 1955-03-23
•
Granted: 1957-04-09
•
Expires: 1975-03-23
Abstract
No abstract record available.
Inventors
- 👤 Richard E Heckert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:21
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A COMPOUND SELECTED FROM THE CLASS CONSISTING OF 1,1,2,2-TETRACYANOETHANE AND SALTS THEREOF WITH WATERSOLUBLE CATIONS.
Claim 2
Dependent Claim
15 words
A COMPOUND SELECTED FROM THE CLASS CONSISTING OF 1,1,2,2-TETRACYANOETHANE AND SALTS THEREOF WITH WATERSOLUBLE CATIONS.
References Cited (Backward Citations)
US2514387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |