Patent US4900323A successfully refreshed from Google Patents.
US4900323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical and method for bleaching textiles
Assignee: Lanxess Corp
•
Filing: 1987-11-05
•
Granted: 1990-02-13
•
Expires: 2007-11-05
Abstract
Abstract A bleaching composition comprising a partially saturated carrier and a bleaching agent prepared by first mixing the dry carrier with the dry bleaching agent and then adding water while continuing mixing to produce a moist powder. This powder is used in a tumbler with at least partially non-synthetic dyed fabrics to dry bleach or fade the dye from the fabrics. Specifically, the bleaching composition is a mix of potassium permanganate as the bleaching agent and diatomaceous earth as the carrier and is tumbled with the fabric to remove the dye from the fabric. The tumbling causes repeated contact with the bleaching agent and removes the dye in the fabric.
Inventors
- 👤 Glen A. Dickson
- 👤 Donnie R. Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:53
CPC Classifications
D; D06; D06P; D06P5/00; D06P5/15; D06P5/153; D06P5/158; D06P7/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
79 words
A non-aqueous method for fading a previously dyed denim fabric comprising the steps of: (a) placing the previously dyed denim fabric in a tumbler; (b) adding particulate diatomaceous earth as a carrier for a potassium permanganate therewith; (c) tumbling the denim fabric in the tumbler for an interval sufficient to obtain a desired color fading; (d) rinsing after tumbling to obtain the faded denim fabric after having a desired color fade; and (e) drying the color faded denim fabric.
Claim 2
Dependent Claim
79 words
A non-aqueous method for fading a previously dyed denim fabric comprising the steps of: (a) placing the previously dyed denim fabric in a tumbler; (b) adding particulate diatomaceous earth as a carrier for a potassium permanganate therewith; (c) tumbling the denim fabric in the tumbler for an interval sufficient to obtain a desired color fading; (d) rinsing after tumbling to obtain the faded denim fabric after having a desired color fade; and (e) drying the color faded denim fabric.
Claim 3
Dependent Claim
18 words
The method as described in claim 1 wherein the potassium permanganate is initially absorbed into the diatomaceous earth.
Claim 4
Dependent Claim
21 words
The method as described in claim 1 wherein the potassium permanganate is an effective amount 1/2 to about 20% by weight.
Claim 5
Dependent Claim
92 words
A non-aqueous method for fading a previously dyed denim fabric comprising the steps of: (a) placing the previously dyed denim fabric in a tumbler; (b) adding a particulate diatomaceous earth carrier containing a bleaching composition selected from the group consisting of chlorine bleaches and peroxygen bleaches; (c) tumbling the denim fabric in the tumbler with the bleaching composition for an interval sufficient to obtain a desired color fading; (d) rinsing after tumbling to obtain the faded denim fabric after having a desired color fade; and (e) drying the color faded denim fabric.
Claim 6
Dependent Claim
92 words
A non-aqueous method for fading a previously dyed denim fabric comprising the steps of: (a) placing the previously dyed denim fabric in a tumbler; (b) adding a particulate diatomaceous earth carrier containing a bleaching composition selected from the group consisting of chlorine bleaches and peroxygen bleaches; (c) tumbling the denim fabric in the tumbler with the bleaching composition for an interval sufficient to obtain a desired color fading; (d) rinsing after tumbling to obtain the faded denim fabric after having a desired color fade; and (e) drying the color faded denim fabric.
Claim 7
Independent Claim
102 words
A method for fading a previously dyed denim fabric comprising the steps of: (a) placing the previously dyed denim fabric in a tumbler; (b) adding water to the tumbler with particulate diatomaceous earth and bleaching composition selected from the group consisting of chlorine bleaches and peroxygen bleaches therein in an amount effective to accomplish color fading; (c) tumbling the denim fabric in the tumbler with the bleaching composition for an interval sufficient to obtain a desired color fading; (d) rinsing after tumbling to obtain the faded denim fabric after having a desired color fade; and (e) drying the color faded denim fabric.
Claim 8
Independent Claim
102 words
A method for fading a previously dyed denim fabric comprising the steps of: (a) placing the previously dyed denim fabric in a tumbler; (b) adding water to the tumbler with particulate diatomaceous earth and bleaching composition selected from the group consisting of chlorine bleaches and peroxygen bleaches therein in an amount effective to accomplish color fading; (c) tumbling the denim fabric in the tumbler with the bleaching composition for an interval sufficient to obtain a desired color fading; (d) rinsing after tumbling to obtain the faded denim fabric after having a desired color fade; and (e) drying the color faded denim fabric.
Claim 9
Dependent Claim
17 words
The method of claim 5 wherein the water is provided with an effective amount of potassium permanganate.
Claim 10
Dependent Claim
15 words
The method of claim 6 wherein the potassium permanganate is added directly to the water.
Claim 11
Dependent Claim
10 words
The denim products made by the method of claim 6.
Claim 12
Dependent Claim
10 words
The denim products made by the method of claim 6.
Claim 13
Dependent Claim
10 words
The denim products made by the method of claim 4.
Claim 14
Dependent Claim
10 words
The denim products made by the method of claim 1.
Claim 15
Dependent Claim
31 words
The method of claim 5 wherein the bleaching composition is selected from the group consisting of potassium permanganate, sodium hypochlorite, sodium chlorite, potassium persulfate, sodium persulfate, ammonium persulfate and sodium hyposulfite.
References Cited (Backward Citations)
US3048546A
Cited
US4130392A
Cited
US4536182A
Cited
US4655953A
Cited
US4740213A
Cited
JPH0565681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-12 | 1993-08-14 | 1994-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-12 | 1997-08-14 | 1998-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-12 | 2001-08-14 | 2002-02-13 | $7700.00 | Window Closed / Lapsed |