US4457760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for desizing and bleaching cloth with a hydrogen peroxide-based bath in a single operation
Assignee: Produits Chimiques Ugine Kuhlmann
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Filing: 1981-12-28
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Granted: 1984-07-03
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Expires: 2001-12-28
Abstract
Abstract Processes for desizing and bleaching cloth in a single operation utilizing a bath containing hydrogen peroxide, sodium hydroxide, a sequestrant, an enzyme preparation based on a starch-degrading enzyme, and a surface active agent, such processes resulting in significant economies in usage of water and of steam, labor, and capital costs.
Inventors
- 👤 Jean-Marie Cholley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:51
CPC Classifications
D; D06; D06L; D06L1/00; D06L1/12; D06L1/14; D06L4/00; D06L4/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
34 words
A process for desizing and bleaching cellulosic fabrics in a single operation, which process comprises impregnating cellulosic cloth wih a basic desizing-bleaching composition containing hydrogen peroxide, a starch-degrading enzyme, and an alkali metal hydroxide.
Claim 2
Dependent Claim
34 words
A process for desizing and bleaching cellulosic fabrics in a single operation, which process comprises impregnating cellulosic cloth wih a basic desizing-bleaching composition containing hydrogen peroxide, a starch-degrading enzyme, and an alkali metal hydroxide.
Claim 3
Dependent Claim
14 words
A process according to claim 1 wherein the desizing-bleaching composition includes a sequestering agent.
Claim 4
Dependent Claim
15 words
A process according to claim 1 wherein the desizing-bleaching composition includes a surface active agent.
Claim 5
Dependent Claim
17 words
A process according to claim 1 carried out at a temperature of from 20° to 120° C.
Claim 6
Dependent Claim
44 words
A process according to claim 1 wherein the cloth is impregnated with the desizing-bleaching composition and the impregnated cloth is then squeezed to provide an amount of composition in the cloth of from about 60 to 120 percent of the weight of the fabric.
Claim 7
Dependent Claim
22 words
A process according to claim 1 wherein the fabric is steamed to raise its temperature to about 20° C. to 120° C.
Claim 8
Dependent Claim
23 words
A process according to claim 1 wherein the fabric is held in contact with the composition for from five minutes to four hours.
Claim 9
Dependent Claim
14 words
A process according to claim 1 wherein the alkali metal hydroxide is sodium hydroxide.
Claim 10
Dependent Claim
33 words
A desizing-bleaching composition consisting essentially of an aqueous mixture containing hydrogen peroxide (35%), 40-60 mL/L; caustic soda, 6-7 g/L; sequestering agent, 2-6 g/L; amylolytic enzyme, 8-12 g/L; and surface active agent, 1-2 mL/L.
Claim 11
Dependent Claim
33 words
A desizing-bleaching composition consisting essentially of an aqueous mixture containing hydrogen peroxide (35%), 40-60 mL/L; caustic soda, 6-7 g/L; sequestering agent, 2-6 g/L; amylolytic enzyme, 8-12 g/L; and surface active agent, 1-2 mL/L.
References Cited (Backward Citations)
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US3595603A
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US3579454A
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US3838967A
Cited
US3740188A
Cited
US4195974A
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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) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |