US4121899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation dyeing
Assignee: Milliken Research Corp
•
Filing: 1977-03-04
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Granted: 1978-10-24
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Expires: 1997-03-04
Abstract
Abstract Fibers are dyed by applying an aqueous dyeing formulation to the fibers, cooling them and condensing halogenated hydrocarbon vapors upon the cool, wet fibers. Residual halogenated hydrocarbon is removed by exposing the fibers to heat.
Inventors
- 👤 Thomas Van Chambers
- 👤 Julian J. Hirshfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:35
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/34; D06P3/52; D06P3/54; D06P1/00; D06P1/0028; D06P3/82; D06P3/8204; D06P3/8295; D06P5/00; D06P5/02; D06P5/04
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
93 words
A method of dyeing fibers, which comprises the steps of: applying an aqueous dyeing formulation containing a dyestuff which is suitable for dyeing said fibers to the fibers; cooling the fibers while still wet to a first temperature; exposing the cooled, undried fibers to vapors of a halogenated hydrocarbon having a boiling point which is higher than said first temperature, the boiling point of said halogenated hydrocarbon being between 25° C. and 65° C.; and condensing said halogenated hydrocarbon on the fibers to promote dyeing; and removing said halogenated hydrocarbon from the fibers.
Claim 2
Independent Claim
93 words
A method of dyeing fibers, which comprises the steps of: applying an aqueous dyeing formulation containing a dyestuff which is suitable for dyeing said fibers to the fibers; cooling the fibers while still wet to a first temperature; exposing the cooled, undried fibers to vapors of a halogenated hydrocarbon having a boiling point which is higher than said first temperature, the boiling point of said halogenated hydrocarbon being between 25° C. and 65° C.; and condensing said halogenated hydrocarbon on the fibers to promote dyeing; and removing said halogenated hydrocarbon from the fibers.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said dyeing formulation includes a thickener.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein said halogenated hydrocarbon is chosen from the group consisting of methylene chloride and chloroform.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein said halogenated hydrocarbon is methylene chloride.
Claim 6
Dependent Claim
14 words
The method of claim 4 wherein the residual halogenated hydrocarbon is removed by steaming.
Claim 7
Dependent Claim
11 words
The method of claim 1 wherein said halogenated hydrocarbon is chloroform.
Claim 8
Dependent Claim
22 words
The method of claim 1 further comprising the steps of: recovering the halogenated hydrocarbon by condensation; and recycling the recovered halogenated hydrocarbon.
Claim 9
Dependent Claim
41 words
The method of claim 1 wherein the halogenated hydrocarbon vapors have a partial pressure which is at least 50% of the total pressure and wherein the fibers are exposed to the halogenated hydrocarbon vapors for between 30 seconds and 20 minutes.
Claim 10
Dependent Claim
23 words
The method of claim 1 wherein the halogenated hydrocarbon vapors have a partial pressure which is at least 90% of the total pressure.
Claim 11
Dependent Claim
14 words
The method of claim 9 wherein the fibers are cooled to below 0° C.
Claim 12
Dependent Claim
14 words
The method of claim 9 wherein the fibers are cooled to below -10° C.
Claim 13
Dependent Claim
20 words
The method of claim 9 wherein the fibers are cooled to substantially solidify the aqueous dyeing formulation on the fibers.
Claim 14
Dependent Claim
14 words
The method of claim 1 wherein the fibers are cooled to below 0° C.
Claim 15
Dependent Claim
14 words
The method of claim 1 wherein the fibers are cooled to below -10° C.
Claim 16
Dependent Claim
20 words
The method of claim 1 wherein the fibers are cooled to substantially solidify the aqueous dyeing formulation on the fibers.
Claim 17
Dependent Claim
51 words
The method of claim 1 wherein said dyeing formulation includes: a thickener; wherein said halogenated hydrocarbon is chosen from the group consisting of methylene chloride and chloroform; and further comprising the steps of removing the halogenated hydrocarbon by steaming; recovering the halogenated hydrocarbon by condensation; and recycling the recovered halogenated hydrocarbon.
Claim 18
Dependent Claim
41 words
The method of claim 16 wherein said halogenated hydrocarbon vapors have a partial pressure which is at least 90% of the total pressure, and wherein the fibers are exposed to the halogenated hydrocarbon vapors for between 30 seconds and 20 minutes.
Claim 19
Dependent Claim
12 words
The method of claim 17 wherein said halogenated hydrocarbon is methylene chloride.
Claim 20
Dependent Claim
14 words
The method of claim 18 wherein the fibers are cooled to below 0° C.
Claim 21
Dependent Claim
14 words
The method of claim 18 wherein the fibers are cooled to below -10° C.
Claim 22
Dependent Claim
20 words
The method of claim 18 wherein the fibers are cooled to substantially solidify the aqueous dyeing formulation on the fibers.
Claim 23
Dependent Claim
11 words
The method of claim 17 wherein said halogenated hydrocarbon is chloroform.
Claim 24
Dependent Claim
14 words
The method of claim 22 wherein the fibers are cooled to below 0° C.
Claim 25
Dependent Claim
14 words
The method of claim 22 wherein the fibers are cooled to below -10° C.
Claim 26
Dependent Claim
19 words
The method of claim 22 wherein the fibers are cooled to substantially solidify the dyeing formulation on the fibers.
Claim 27
Independent Claim
117 words
A method of dyeing fabrics which are blends of polyester and another fiber, comprising the steps of: applying an aqueous dyeing formulation to the fabric, said dyeing formulation containing a first dyestuff which is suitable for dyeing polyester and a second dyestuff which is suitable for dyeing the other fiber; and a coacervating agent; cooling the wet fabric to a first temperature; exposing the cooled, undried fabric to vapors of a halogenated hydrocarbon having a boiling point which is higher than said first temperature, the boiling point of said halogenated hydrocarbon being between 25° C. and 65° C. and condensing said halogenated hydrocarbon on the fabric to promote dyeing; and removing said halogenated hydrocarbon from the fabric.
Claim 28
Independent Claim
117 words
A method of dyeing fabrics which are blends of polyester and another fiber, comprising the steps of: applying an aqueous dyeing formulation to the fabric, said dyeing formulation containing a first dyestuff which is suitable for dyeing polyester and a second dyestuff which is suitable for dyeing the other fiber; and a coacervating agent; cooling the wet fabric to a first temperature; exposing the cooled, undried fabric to vapors of a halogenated hydrocarbon having a boiling point which is higher than said first temperature, the boiling point of said halogenated hydrocarbon being between 25° C. and 65° C. and condensing said halogenated hydrocarbon on the fabric to promote dyeing; and removing said halogenated hydrocarbon from the fabric.
Claim 29
Dependent Claim
12 words
The method of claim 26 wherein said dyeing formulation includes a thickener.
Claim 30
Dependent Claim
23 words
The method of claim 27 wherein the halogenated hydrocarbon vapors have a partial pressure which is at least 90% of the total pressure.
Claim 31
Dependent Claim
28 words
The method of claim 28 wherein said other fiber is acrylic and wherein said first dyestuff is a disperse dyestuff and said second dyestuff is a basic dyestuff.
Claim 32
Dependent Claim
20 words
The method of claim 1 wherein said halogenated hydrocarbon is chosen from the group consisting of methylene chloride and chloroform.
Claim 33
Dependent Claim
32 words
The method of claim 30 wherein the residual halogenated hydrocarbon is removed by steaming, and wherein the fibers are exposed to the halogenated hydrocarbon vapors for between 30 seconds and 20 minutes.
Claim 34
Dependent Claim
22 words
The method of claim 31 further comprising the steps of: recovering the halogenated hydrocarbon by condensation; and recycling the recovered halogenated hydrocarbon.
Claim 35
Dependent Claim
14 words
The method of claim 32 wherein the fibers are cooled to below 0° C.
Claim 36
Dependent Claim
14 words
The method of claim 32 wherein the fibers are cooled to below -10° C.
Claim 37
Dependent Claim
19 words
The method of claim 32 wherein the fibers are cooled to substantially solidify the dyeing formulation on the fibers.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |