US3928351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multifunctional pyrazines
Assignee: EIDP Inc
•
Filing: 1973-10-05
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Granted: 1975-12-23
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Expires: 1993-10-05
Abstract
Abstract Certain novel dicyano- and tricyano-pyrazines are obtained by replacing one or two cyano groups of tetracyanopyrazine. The compounds are fluorescent and can be used to prepare polymers.
Inventors
- 👤 Dennis Scott Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:48
CPC Classifications
C; C07; C07D; C07D241/00; C07D241/02; C07D241/10; C07D241/14; C07D241/24; C07D241/26; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5046; C08G59/5053; C08G59/5073; C08G69/00; C08G69/02; C08G69/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
13 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 2-(NMETHYL-N-PHENYLAMINO)-3,5,6-TRICYANOPYRAZINE, 2-ANILINO3,5,6-TRICYANOPYRAZINE, 2-ALLYLAMINO-3,5,6-TRICYANOPYRAZINE, AND 2-BENZYLAMINO-3,5,6-TRICYANOPYRAZINE.
Claim 2
Dependent Claim
13 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 2-(NMETHYL-N-PHENYLAMINO)-3,5,6-TRICYANOPYRAZINE, 2-ANILINO3,5,6-TRICYANOPYRAZINE, 2-ALLYLAMINO-3,5,6-TRICYANOPYRAZINE, AND 2-BENZYLAMINO-3,5,6-TRICYANOPYRAZINE.
Claim 3
Dependent Claim
8 words
The compound of claim 1 which is 2-(N-methyl-N-phenylamino)-3,5,6-tricyanopyrazine.
Claim 4
Dependent Claim
8 words
The compound of claim 1 which is 2-anilino-3,5,6-tricyanopyrazine.
Claim 5
Dependent Claim
8 words
The compound of claim 1 which is 2-allylamino-3,5,6-tricyanopyrazine.
Claim 6
Dependent Claim
8 words
The compound of claim 1 which is 2-benzylamino-3,5,6-tricyanopyrazine.
References Cited (Backward Citations)
US3101344A
Cited
US3763161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |