Patent US3841831A successfully refreshed from Google Patents.
US3841831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dyeing polyester fiber
Assignee: Unilever Bestfoods North America
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Filing: 1972-11-29
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Granted: 1974-10-15
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Expires: 1992-11-29
Abstract
Abstract A novel process for dyeing polyester fiber and polyester fiber articles comprising the steps of (1) forming an aqueous dye bath containing a small but effective amount up to 0.3 percent by weight, disperse dye, said dye bath being at a temperature between 25*C to 100*C; (2) immersing polyester fiber in the dye bath for a period of at least about 10 minutes; (3) rinsing the riber with water; (4) drying the fiber; and (5) exposing the dried fiber to dry heat at a temperature between 120*C to 230*C.
Inventors
- 👤 J Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:14
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/34; D06P3/52; D06P3/54; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922; Y10S8/924; Y10S8/933
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
89 words
A PROCESS FOR DYEING POLYESTER FIBER COMPRISING THE STEPS OF (1) FORMING AN AQUEOUS DYE BATH CONSISTING ESSENTIALL OF A SMALL BUT EFFECTIVE AMOUNT UP TO 0.3 PERCENT, BY WEIGHT DISPERSE DYE, SAID DYE BATH BEING AT A TEMPERATURE BETWEEN 25*C TO 100*C AT ATMOSPHERIC PRESSURE; (2) IMMERSING POLYESTER FIBER IN THE DYE BATH FOR A PERIOD OF AT LEAST ABOUT 10 MINUTES; (3) RINSING THE FIBER WITH WATER; (4) DRYING THE FIBER; AND (5) EXPOSING THE DRIED FIBER TO DRY HEAT AT A TEMPERATURE BETWEEN 120*C TO 230*C.
Claim 2
Dependent Claim
89 words
A PROCESS FOR DYEING POLYESTER FIBER COMPRISING THE STEPS OF (1) FORMING AN AQUEOUS DYE BATH CONSISTING ESSENTIALL OF A SMALL BUT EFFECTIVE AMOUNT UP TO 0.3 PERCENT, BY WEIGHT DISPERSE DYE, SAID DYE BATH BEING AT A TEMPERATURE BETWEEN 25*C TO 100*C AT ATMOSPHERIC PRESSURE; (2) IMMERSING POLYESTER FIBER IN THE DYE BATH FOR A PERIOD OF AT LEAST ABOUT 10 MINUTES; (3) RINSING THE FIBER WITH WATER; (4) DRYING THE FIBER; AND (5) EXPOSING THE DRIED FIBER TO DRY HEAT AT A TEMPERATURE BETWEEN 120*C TO 230*C.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein the aqueous dye bath contains from about 0.0001 to 0.3 percent, by weight, disperse dye.
Claim 4
Dependent Claim
21 words
The process of claim 2 wherein the aqueous dye bath contains from about 0.001 to 0.2 percent, by weight, disperse dye.
Claim 5
Dependent Claim
16 words
The process of claim 1 wherein the dye bath temperature is from about 50*C to 80*C.
Claim 6
Dependent Claim
17 words
The process of claim 2 wherein the dry heat is at a temperature between 176*C to 190*C.
Claim 7
Dependent Claim
18 words
The process of claim 1 wherein the exposure to dry heat is from about 2 to 60 seconds.
Claim 8
Dependent Claim
21 words
The process of claim 1 wherEin the fiber is immersed for a period of from about 10 minutes to 60 minutes.
Claim 9
Dependent Claim
13 words
The process of claim 7 wherein the fiber is wetted prior to immersion.
Claim 10
Dependent Claim
11 words
The process of claim 7 wherein the immersed fiber is agitated.
Claim 11
Dependent Claim
20 words
The process of claim 1 wherein the fiber is rinsed with water until the rinse water is free from color.
Claim 12
Dependent Claim
23 words
The process of claim 7 wherein the fiber is immersed in the dye bath for a period of about 20 to 40 minutes.
Claim 13
Dependent Claim
11 words
The process of claim 1 wherein the polyester is polyethylene terphthalate.
Claim 14
Dependent Claim
17 words
The process of claim 1 wherein the polyester fiber is a blend of polyester and natural fiber.
Claim 15
Dependent Claim
11 words
The process of claim 13 wherein the natural fiber is cotton.
Claim 16
Dependent Claim
95 words
A process for dyeing polyester fabric comprising the steps of (1) forming an aqueous dye bath consisting essentially of from about 0.0001 to 0.3 percent, by weight, disperse dye, said dye bath being at a temperature between 25*C to 100*C at atmospheric pressure; (2) immersing polyester fabric in the dye bath for a period of from about 10 minutes to 60 minutes; (3) rinsing the fabric with water; (4) drying the fabric; and (5) exposing the dried fabric to dry heat at a temperature between 120*C to 230*C for from about 2 to 60 seconds.
Claim 17
Dependent Claim
95 words
A process for dyeing polyester fabric comprising the steps of (1) forming an aqueous dye bath consisting essentially of from about 0.0001 to 0.3 percent, by weight, disperse dye, said dye bath being at a temperature between 25*C to 100*C at atmospheric pressure; (2) immersing polyester fabric in the dye bath for a period of from about 10 minutes to 60 minutes; (3) rinsing the fabric with water; (4) drying the fabric; and (5) exposing the dried fabric to dry heat at a temperature between 120*C to 230*C for from about 2 to 60 seconds.
Claim 18
Dependent Claim
21 words
The process of claim 15 wherein the aqueous dye bath contains from about 0.001 to 0.2 percent, by weight, disperse dye.
Claim 19
Dependent Claim
16 words
The process of claim 15 wherein the dye bath temperature is from about 50*C to 95*C.
Claim 20
Dependent Claim
17 words
The process of claim 15 wherein the dry heat is at a temperature between 176*C to 190*C.
Claim 21
Dependent Claim
18 words
The process of claim 18 wherein the exposure to dry heat is from about 2 to 10 seconds.
Claim 22
Dependent Claim
13 words
The process of claim 18 wherein the fabric is wetted prior to immersion.
Claim 23
Dependent Claim
11 words
The process of claim 20 wherein the immersed fabric is agitated.
Claim 24
Dependent Claim
20 words
The process of claim 15 wherein the fabric is rinsed with water until the rinse water is free from color.
Claim 25
Dependent Claim
23 words
The process of claim 22 wherein the fabric is immersed in the dye bath for a period of about 20 to 40 minutes.
Claim 26
Dependent Claim
11 words
The process of claim 15 wherein the polyester is polyethylene terepththalate.
Claim 27
Dependent Claim
17 words
The process of claim 15 wherein the polyester fabric is a blend of polyester and natural fiber.
Claim 28
Dependent Claim
11 words
The process of claim 25 wherein the natural fiber is cotton.
Claim 29
Dependent Claim
13 words
The process of claim 15 wherein the polyester fabric is a sewn article.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |