US3762861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide and polyester fibers dyed with a 1,3,4-thiadiazolylazo-3-(cyclohexylamino) acylanilide dye
Assignee: Novartis Corp
•
Filing: 1972-03-27
•
Granted: 1973-10-02
•
Expires: 1992-03-27
Abstract
Abstract Fibers having a basis of a synthetic linear polyamide or linear polyester are dyed bright, fast, scarlet to pink shades with a monoazo compound containing a 1,3,4-thiadiazolyl diazo component and an N-cyclohexyl-m-acylamidoaniline coupling component.
Inventors
- 👤 W Moore
- 👤 M Weaver
- 👤 J Straley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:36
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/0025; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922; Y10S8/924
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
39 words
A fiber having a basis of poly(hexamethylene adipamide), polycaprolactam, or poly(ethylene terephthalate) dyed with a compound defined in claim 1 wherein R represents the group R4-X-and one of R1 and R2 is lower alkyl and the other is hydrogen.
Claim 2
Dependent Claim
63 words
A fiber having a basis of poly(hexamethylene adipamide) or polycaprolactam dyed with a compound defined in claim 1 and having the formula v,50/7 wherein R4 is lower alkyl; X is -O- or -S-; A is lower alkanoyl, lower alkoxycarbonyl, or benzoyl; R1 and R3 each is hydrogen or methyl; R2 is hydrogen or lower alkyl; and one of R1 and R2 is hydrogen.
Claim 3
Dependent Claim
30 words
A fiber according to claim 3 dyed with a compound defined therein in which R4 is methyl or ethyl, A is acetyl or propionyl, and R2 and R3 is hydrogen.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |