Patent US3775048A successfully refreshed from Google Patents.
US3775048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the continuous dyeing of polyester fibers with anthraquinone dyestuffs
Assignee: Bayer AG
•
Filing: 1971-04-07
•
Granted: 1973-11-27
•
Expires: 1991-04-07
Abstract
Abstract Process for the continuous dyeing of synthetic fibre materials from organic solvents wherein the fiber materials are impregnated with solutions of anthraquinone dyestuffs of the formula IN WHICH A, B and B1 have the meaning given below, in organic water-immiscible solvents and are subsequently subjected to a heat treatment. There are obtained without originating waste waters, dyeings with excellent fastness properties and high dyestuff yields.
Inventors
- 👤 R Neeff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:53
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/36; C09B1/46; D; D06; D06P; D06P1/00; D06P1/90; D06P1/92; D06P1/922; D06P1/924; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921; Y10S8/922; Y10S8/924; Y10S8/928
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
23 words
The process of claim 1 in which said heat treatment step (B) is conducted for a brief period with dry heat at 120*-230*C.
Claim 2
Dependent Claim
20 words
The process of claim 1 in which said heat treatment step (B) is conducted in overheated solvent vapor at 100*-150*C.
Claim 3
Dependent Claim
13 words
The process of claim 1 in which the anthraquinone dyestuff has the formula
Claim 4
Dependent Claim
13 words
The process of claim 1 in which the anthraquinone dyestuff has the formula
Claim 5
Dependent Claim
13 words
The process of claim 1 in which the anthraquinone dyestuff has the formula
Claim 6
Dependent Claim
13 words
The process of claim 1 in which the anthraquinone dyestuff has the formula
Claim 7
Dependent Claim
13 words
The process of claim 1 in which the anthraquinone dyestuff has the formula
Claim 8
Dependent Claim
17 words
The process of claim 1 in which said anthraquinone dyestuff is soluble in said water-immiscible organic solvent.
Claim 9
Dependent Claim
30 words
The process of claim 9 in which the dyed material is subjected to a subsequent step of (C) rinsing with water-immiscible organic solvent in which said anthraquinone dyestuff is soluble.
Claim 10
Dependent Claim
24 words
The process of claim 1 in which said water-immiscible organic solvent is an aliphatic chlorohydrocarbon having a boiling point of between 40* and 150*C.
Claim 11
Dependent Claim
25 words
The process of claim 1 in which said water-immiscible organic solvent is selected from the group consisting of tetrachloroethylene, trichloroethylene, 1,1,-1-trichloroethane, 1,1,1-trichloropropane and mixtures thereof.
References Cited (Backward Citations)
US2274751A
Cited
US3074945A
Cited
US2184559A
Cited
US3473175A
Cited
US3459729A
Cited
US3510243A
Cited
FR1581325A
Cited
US3667898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |