Patent US3879434A successfully refreshed from Google Patents.
US3879434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis-methine compounds
Assignee: Novartis Corp
•
Filing: 1970-11-23
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Granted: 1975-04-22
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Expires: 1990-11-23
Abstract
Abstract WHEREIN R2 and R4 each is alkylene, X is oxygen or nitrogen and R3 is alkylene which can be interrupted by an oxygen, sulfur or nitrogen atom, vinylene, ethynylene, cycloalkylene, cycloalkyldialkylene, arylene or naphthylene are useful as dyes for hydrophobic textile materials such as polyester fibers. Compounds having two cyanomethylideneaniline moieties linked together through the aniline nitrogen atom of each by a group having the formula
Inventors
- 👤 Max A Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:55
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/14; C09B23/143; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
5 words
A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND HAVING THE FORMULA
Claim 3
Dependent Claim
5 words
A compound having the formula
Claim 4
Dependent Claim
5 words
A compound having the formula
Claim 5
Dependent Claim
9 words
A compound according to claim 1 having the formula
Claim 6
Dependent Claim
28 words
A compound according to claim 1 wherein R3 represents lower alkylene, vinylene, cyclohexylene, phenylene, or phenylene substituted with lower alkyl, lower alkoxy, or halogen; and Y represents cyano.
Claim 7
Dependent Claim
9 words
A compound according to claim 1 having the formula
Claim 8
Dependent Claim
17 words
A compound according to claim 4 wherein R10 represents hydrogen or lower alkyl; and R11 represents hydrogen.
Claim 9
Dependent Claim
9 words
A compound according to claim 1 having the formula
Claim 10
Dependent Claim
9 words
A compound according to claim 1 having the formula
Claim 11
Dependent Claim
9 words
A compound according to claim 1 having the formula
Claim 12
Dependent Claim
9 words
A compound according to claim 1 having the formula
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |