US3620663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the dyeing of synthetic fiber materials and blends with quaternary nitrogen group containing dyestuffs
Assignee: Bayer AG
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Filing: 1967-06-01
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Granted: 1971-11-16
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Expires: 1987-06-01
Abstract
Abstract Process for dyeing synthetic fiber materials e.g. aromatic polyester, and fiber blends, e.g. blends of polyester with wool, in an aqueous solution at a pH of 4-6.5 at temperatures of about 98* to 140* C. with a quaternary nitrogen group containing dyestuff, said dyestuff being free of sulfonic and carboxylic acid groups.
Inventors
- 👤 Winfried Kruckenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:26
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/32; C09B1/00; C09B1/002; C09B1/50; C09B1/51; C09B11/00; C09B11/04; C09B11/10; C09B23/00; C09B23/10; C09B23/105; C09B23/14; C09B23/143; C09B51/00; C09B62/00; C09B62/44; C09B62/443; C09B69/00; C09B69/001; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922; Y10S8/924
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
12 words
The process of claim 1 wherein D is a monoazo dyestuff radical.
Claim 2
Dependent Claim
8 words
The process of claim 1 wherein D is
Claim 3
Dependent Claim
15 words
The process of claim 3 wherein m is 1, and A is a carbocyclic radical.
Claim 4
Dependent Claim
38 words
Process for dyeing aromatic polyester fiber material comprising applying to said fiber an aqueous acidic solution at a pH of 4-6.5 at an elevated temperature, of a dyestuff free of sulfonic and carboxylic acid groups having the formula
Claim 5
Dependent Claim
38 words
Process for dyeing aromatic polyester fiber material comprising applying to said fiber an aqueous acidic solution at a pH of 4-6.5 at an elevated temperature, of a dyestuff free of sulfonic and carboxylic acid groups having the formula
Claim 6
Dependent Claim
54 words
Process for dyeing fiber materials selected from the group consisting of aromatic polyesters, blends of polyester with wool, cellulose acetates and synthetic superpolyamides comprising applying to said fiber an aqueous acidic solution at a pH of 4-6.5 at an elevated temperature, of a dyestuff free of sulfonic and carboxylic acid groups having the formula
Claim 7
Dependent Claim
13 words
The process of claim 7 wherein the fiber material is a synthetic superpolyamide.
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |