US3787178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester textile fibers dyed with thiazole or benzothiazole carbazole dyes
Assignee: AMERICAN ANILINE PROD INC US
•
Filing: 1972-02-28
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Granted: 1974-01-22
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Expires: 1992-02-28
Abstract
Abstract A new series of azo dyes is produced by coupling a diazotized heterocylic amine base with a carbazole coupler. The compounds of the invention are excellent dyes for polyester fabrics and also are pigments for rigid plastic materials.
Inventors
- 👤 E Renfrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:26
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3608; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
Polyester textile fibers dyed with a compound of the formula
Claim 2
Dependent Claim
13 words
Polyester textile fibers of claim 1 dyed with a compound of the formula
References Cited (Backward Citations)
CH367254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |