US2717261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Symmetrical cyano-containing compounds and their preparation
Assignee: EIDP Inc
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Filing: 1954-05-06
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Granted: 1955-09-06
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Expires: 1974-05-06
Abstract
No abstract record available.
Inventors
- 👤 Krespan Carl George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:30
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
34 words
A COMPOUND OF THE FORMULA R-(C(CN)2C(CN)2)N-R IS AN ORGANIC RADICAL CONTAINING TETRACYANOETHYLENE CLUSIVE, AND R IS AN ORGANIC RADICAL CONTAINING A TERTIARY CARBON BONDED TO THE CENTRAL UNIT AND BEARING A SINGLE CYANO GROUP.
Claim 2
Dependent Claim
34 words
A COMPOUND OF THE FORMULA R-(C(CN)2C(CN)2)N-R IS AN ORGANIC RADICAL CONTAINING TETRACYANOETHYLENE CLUSIVE, AND R IS AN ORGANIC RADICAL CONTAINING A TERTIARY CARBON BONDED TO THE CENTRAL UNIT AND BEARING A SINGLE CYANO GROUP.
Claim 3
Dependent Claim
50 words
PROCESS OF PREPARING SYMMETRICAL CYANO-CONTAINING COMPOUNDS WHICH COMPRISES REACTING TETRACYANOETHYLENE WITH AN ALPHA,ALPHA''-AZOBISNITRILE HAVING BONDED TO EACH NITROGEN OF SAID AZO, -N=N-, GROUP IN THE PROPORTION OF ATOM BEARING A SINGLE CYANO GROUP IN THE PROPORTION OF ONE MOLE OF SAID TETRACYANOETHYLENE TO AT LEAST ONE-HALF MOLE OF SAID ALPHA,ALPHA''-AZOBISNITRILE.
Claim 4
Dependent Claim
50 words
PROCESS OF PREPARING SYMMETRICAL CYANO-CONTAINING COMPOUNDS WHICH COMPRISES REACTING TETRACYANOETHYLENE WITH AN ALPHA,ALPHA''-AZOBISNITRILE HAVING BONDED TO EACH NITROGEN OF SAID AZO, -N=N-, GROUP IN THE PROPORTION OF ATOM BEARING A SINGLE CYANO GROUP IN THE PROPORTION OF ONE MOLE OF SAID TETRACYANOETHYLENE TO AT LEAST ONE-HALF MOLE OF SAID ALPHA,ALPHA''-AZOBISNITRILE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-05 | 1959-03-07 | 1959-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-05 | 1963-03-07 | 1963-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-05 | 1967-03-07 | 1967-09-06 | $7700.00 | Window Closed / Lapsed |