US4828569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detergent compositions for removing iodine stains
Assignee: WEN-DON Corp A CORP OF VIRGINIA
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Filing: 1988-03-28
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Granted: 1989-05-09
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Expires: 2008-03-28
Abstract
Abstract Stains caused by povidone iodine-complex antiseptics are removed from stained linens with detergent formulations containing N-alkyl-2-pyrrolidone, gamma butyrolactone, 2-ethyl-1,3-hexanediol or 4-methyl-1,3-dioxolane-2-one.
Inventors
- 👤 William T. Heath
- 👤 William H. Byles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:10
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/26; C11D3/32; C11D3/20; C11D3/2003; C11D3/2041; C11D3/2048; C11D3/2072; C11D3/2096; C11D3/28; C11D3/43
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
70 words
A method of removing povidone-iodine stains from a textile consisting essentially of contacting a povidone-iodine stained textile with a liquid detergent composition composed of a member selected from the group consisting of an N-alkyl-2-pyrrolidone, gamma butyrolactone, 2-ethyl-1, 3-hexanediol, 4-methyl-1, 3-dioxolane-2-one dispersed in an aqueous anionic and nonionic surfactant-containing solution and maintaining the textile in contact with the solution until the povidone-iodine stains have been substantially completely removed from the textile.
Claim 2
Independent Claim
70 words
A method of removing povidone-iodine stains from a textile consisting essentially of contacting a povidone-iodine stained textile with a liquid detergent composition composed of a member selected from the group consisting of an N-alkyl-2-pyrrolidone, gamma butyrolactone, 2-ethyl-1, 3-hexanediol, 4-methyl-1, 3-dioxolane-2-one dispersed in an aqueous anionic and nonionic surfactant-containing solution and maintaining the textile in contact with the solution until the povidone-iodine stains have been substantially completely removed from the textile.
Claim 3
Independent Claim
67 words
A method of removing polyvinyl-pyrrolidone-iodine complex stains from a textile comprising contacting the stained textile with an aqueous solution of an amount of a member selected from the group consisting of an N-alkyl-2-pyrrolidone gamma butyrolactone, 2-ethyl-1, 3-hexanediol, 4-methyl-1, 3-dioxolane-2-one sufficient to solubilize substantially all of the polyvinylpyrrolidone with which the iodine is complexed and continuing contact, with agitation, until substantially all of the iodine-complex stains are removed.
Claim 4
Independent Claim
67 words
A method of removing polyvinyl-pyrrolidone-iodine complex stains from a textile comprising contacting the stained textile with an aqueous solution of an amount of a member selected from the group consisting of an N-alkyl-2-pyrrolidone gamma butyrolactone, 2-ethyl-1, 3-hexanediol, 4-methyl-1, 3-dioxolane-2-one sufficient to solubilize substantially all of the polyvinylpyrrolidone with which the iodine is complexed and continuing contact, with agitation, until substantially all of the iodine-complex stains are removed.
Claim 5
Dependent Claim
18 words
The method of claim 1 or 2 in which the pyrrolidone is a C 1 -4 alkyl pyrrolidone.
Claim 6
Dependent Claim
11 words
The method of claim 3 in which the pyrrolidone is N-methyl-2-pyrrolidone.
Claim 7
Dependent Claim
14 words
The method of claim 1 or 2 in which the composition contains gamma butyrolactone.
Claim 8
Dependent Claim
14 words
The method of claim 1 or 2 in which the composition contains 2-ethyl-1, 3-hexanediol.
Claim 9
Dependent Claim
14 words
The method of claim 1 or 2 in which the composition contains 4-methyl-1, 3-dioxolane-2-one.
Claim 10
Dependent Claim
18 words
The method of claim 1 or 2 in which the stained textile is washed in the aqueous solution.
Claim 11
Dependent Claim
29 words
The method of claim 8 in which the textile is washed in the aqueous solution at a temperature in the range of about 90° F. to about 200° F.
Claim 12
Dependent Claim
21 words
The method of claim 1 or 2 in which the aqueous anionic and nonionic surfactant-containing solution also includes an anionic hydrotrope.
Claim 13
Dependent Claim
23 words
A method of removing povidone-iodine stains from a textile comprising washing the textile in an aqueous solution of the composition of claim 13.
Claim 14
Dependent Claim
71 words
A method of machine washing soiled textiles stained with povidone-iodine which method comprises the successive steps of: (1) loading povidone-iodine stained, soiled textiles into a washing machine; (2) adding a stain-and-soil-removing amount of the composition of claim 13 to the machine as the detergent; and (3) washing the stained, soiled textiles with water at a temperature of about 100° F. to about 160° F., thereby substantially completely removing the povidone-iodine stains.
Claim 15
Dependent Claim
58 words
A stain-removing liquid detergent composition for removing povidone-iodine complex stains from a stained textile, consisting essentially, in percent by weight, of: N-alkyl-2-pyrrolidone, gamma butyrolactone, 2-etyhl-1,3-hexanediol, 4-methyl-1,3-dioxolane-2-one:3-15 anionic and nonionic surfactants:17-35 chelating agent: 4-9 organic solvent: 3-8 water: balance to 100 and an amount of sodium or potassium hydroxide sufficient to provide a pH of from 12.0 to 14.0.
Claim 16
Dependent Claim
58 words
A stain-removing liquid detergent composition for removing povidone-iodine complex stains from a stained textile, consisting essentially, in percent by weight, of: N-alkyl-2-pyrrolidone, gamma butyrolactone, 2-etyhl-1,3-hexanediol, 4-methyl-1,3-dioxolane-2-one:3-15 anionic and nonionic surfactants:17-35 chelating agent: 4-9 organic solvent: 3-8 water: balance to 100 and an amount of sodium or potassium hydroxide sufficient to provide a pH of from 12.0 to 14.0.
Claim 17
Dependent Claim
14 words
The composition of claim 13 also including an optical brightener, perfume or a dye.
Claim 18
Dependent Claim
16 words
The composition of claim 13 in which the N-alkyl-2-pyrrolidone is a C 1 -C 3 alkyl.
Claim 19
Dependent Claim
11 words
The composition of claim 15 in which the pyrrolidone is N-methyl-2-pyrrolidone.
Claim 20
Dependent Claim
13 words
The composition of claim 13 containing from 3-15 percent by weight gamma butyrolactone.
Claim 21
Dependent Claim
13 words
The composition of claim 13 containing from 3-15 percent by weight of 2-ethyl-1,3-hexanediol.
Claim 22
Dependent Claim
14 words
The composition of claim 13, containing from 3-15 percent by weight of 4-methyl-1, 3-dioxolane-2-one.
Claim 23
Dependent Claim
56 words
A povidone-iodine complex stain removing composition for removing such stains from textiles, the composition consisting essentially, in percent by weight, of: N-alkyl-2-pyrrolidone:3-12 anionic and nonionic surfactants:17-35 chelating agent:4-9 organic solvent, viscosity adjusters:3-8 optical brightener, dye, perfume:0-0.5 water: balance to 100 and sodium or potassium hydroxide to provide a pH in the range of 12.0 to 14.0.
Claim 24
Dependent Claim
56 words
A povidone-iodine complex stain removing composition for removing such stains from textiles, the composition consisting essentially, in percent by weight, of: N-alkyl-2-pyrrolidone:3-12 anionic and nonionic surfactants:17-35 chelating agent:4-9 organic solvent, viscosity adjusters:3-8 optical brightener, dye, perfume:0-0.5 water: balance to 100 and sodium or potassium hydroxide to provide a pH in the range of 12.0 to 14.0.
References Cited (Backward Citations)
US3828065A
Cited
US4407741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |