US4014805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry cleaning formulation
Assignee: FMC Corp
•
Filing: 1975-11-28
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Granted: 1977-03-29
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Expires: 1995-11-28
Abstract
Abstract Improved dry cleaning formulation containing a dry cleaning solvent, water, inorganic polyphosphate salt, hydrogen peroxide and a suitable detergent surfactant having a pH value of from 5 to 9, which minimizes equipment corrosion and maintains fabric strength while effectively removing hydrophilic stains.
Inventors
- 👤 Harry Marcus Castrantas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:41
CPC Classifications
D; D06; D06L; D06L1/00; D06L1/02; D06L1/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
129 words
An improved dry cleaning formulation which minimizes equipment corrosion and maintains fabric strength while effectively removing hydrophilic stains consisting essentially of: a. about 0.1% to about 30% by weight water; b. about 0.08% to about 12% by weight water-soluble inorganic polyphosphate salt based on the weight of water; c. about 0.003% to about 0.13% by weight hydrogen peroxide to provide about 0.05% to 2.0% W.O.F. hydrogen peroxide; d. about 0.1% to about 5% by weight of a suitable detergent capable of emulsifying the water present in the dry cleaning bath in the solvent and which does not react with hydrogen peroxide or an inorganic polyphosphate salt; and e. the remainder being at least 69% by weight non-aqueous dry cleaning solvent; and having a pH value from 5.0 to 9.0.
Claim 2
Dependent Claim
129 words
An improved dry cleaning formulation which minimizes equipment corrosion and maintains fabric strength while effectively removing hydrophilic stains consisting essentially of: a. about 0.1% to about 30% by weight water; b. about 0.08% to about 12% by weight water-soluble inorganic polyphosphate salt based on the weight of water; c. about 0.003% to about 0.13% by weight hydrogen peroxide to provide about 0.05% to 2.0% W.O.F. hydrogen peroxide; d. about 0.1% to about 5% by weight of a suitable detergent capable of emulsifying the water present in the dry cleaning bath in the solvent and which does not react with hydrogen peroxide or an inorganic polyphosphate salt; and e. the remainder being at least 69% by weight non-aqueous dry cleaning solvent; and having a pH value from 5.0 to 9.0.
Claim 3
Dependent Claim
29 words
The formulation of claim 1 wherein the dry cleaning solvent is selected from the group consisting of: perchloroethylene; trichloroethylene; 1,1,1-trichloro-2,2,2-trifluoroethane; methylchloroform; 1,1,2,2-tetrachloro-1,2-difluoroethane; trichlorofluoromethane; 1,1,2-trichloro-1,2,2-trifluoroethane; 1,1,1,2-tetrachloro-2,2-difluoroethane; 2,2,3-trichloro-1,1,1,3,3-pentafluoropropane; 1,2,2,3,3-pentachloro-1,1,3-trifluoropropane; and hexafluorodichlorobutene.
Claim 4
Dependent Claim
18 words
The formulation of claim 1 containing about 96% to about 98.7% by weight of said dry cleaning solvent.
Claim 5
Dependent Claim
13 words
The formulation of claim 1 containing 1% to 3% by weight of water.
Claim 6
Dependent Claim
20 words
The formulation of claim 1 containing 0.4% to 1.6% by weight inorganic polyphosphate salt based on the weight of water.
Claim 7
Dependent Claim
22 words
The formulation of claim 1 containing 0.01% to 0.017% by weight hydrogen peroxide to provide about 0.15% to 0.25% W.O.F. hydrogen peroxide.
Claim 8
Dependent Claim
32 words
The formulation of claim 1 wherein the water-soluble inorganic polyphosphate salt is selected from the group consisting of sodium tripolyphosphate, tetrasodium pyrophosphate, potassium tripolyphosphate, tetrapotassium pyrophosphate, sodium acid pyrophosphate, and glassy phosphates.
Claim 9
Dependent Claim
91 words
An improved dry cleaning formulation which minimizes equipment corrosion and maintains fabric strength while effectively removing hydrophilic stains consisting essentially of: a. about 96 to about 98.7% by weight dry cleaning solvent; b. 1% to 3% by weight water; c. 0.4% to 1.6% by weight water-soluble inorganic polyphosphate salt based on the weight of water; d. 0.01% to 0.017% by weight hydrogen peroxide to provide 0.15% to 0.25% W.O.F. hydrogen peroxide; e. 0.25% to 0.75% by weight of a suitable detergent surfactant; and having a pH value of 6.0 to 8.8.
Claim 10
Dependent Claim
91 words
An improved dry cleaning formulation which minimizes equipment corrosion and maintains fabric strength while effectively removing hydrophilic stains consisting essentially of: a. about 96 to about 98.7% by weight dry cleaning solvent; b. 1% to 3% by weight water; c. 0.4% to 1.6% by weight water-soluble inorganic polyphosphate salt based on the weight of water; d. 0.01% to 0.017% by weight hydrogen peroxide to provide 0.15% to 0.25% W.O.F. hydrogen peroxide; e. 0.25% to 0.75% by weight of a suitable detergent surfactant; and having a pH value of 6.0 to 8.8.
Claim 11
Dependent Claim
108 words
A process for cleaning textile fabric, which comprises: contacting the textile fabric with a dry cleaning solvent bath prepared by emulsifying at least 69% by weight of a non-aqueous dry cleaning solvent and about 1.0% to about 3.0% by weight water with a surfactant capable of emulsifying the water in said solvent; admixing the resulting emulsion with about 0.002% to 0.3% by weight of a water-soluble inorganic polyphosphate salt and a sufficient amount of hydrogen peroxide to provide 0.05% to 2.0% W.O.F. hydrogen peroxide; maintaining the textile fabric in contact with the dry cleaning bath until the desired bleaching reaction is completed; and recovering a cleaned textile fabric.
Claim 12
Dependent Claim
108 words
A process for cleaning textile fabric, which comprises: contacting the textile fabric with a dry cleaning solvent bath prepared by emulsifying at least 69% by weight of a non-aqueous dry cleaning solvent and about 1.0% to about 3.0% by weight water with a surfactant capable of emulsifying the water in said solvent; admixing the resulting emulsion with about 0.002% to 0.3% by weight of a water-soluble inorganic polyphosphate salt and a sufficient amount of hydrogen peroxide to provide 0.05% to 2.0% W.O.F. hydrogen peroxide; maintaining the textile fabric in contact with the dry cleaning bath until the desired bleaching reaction is completed; and recovering a cleaned textile fabric.
References Cited (Backward Citations)
US3838967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |