US3635656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drycleaning method
Assignee: Emery Oleochemicals LLC
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Filing: 1971-01-11
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Granted: 1972-01-18
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Expires: 1991-01-11
Abstract
Abstract A process for drycleaning fabrics such as garments and other drycleanable materials, particularly highly soiled garments, by using hydrocarbon and chlorinated hydrocarbon solvents. The process includes a plurality of phases in a cleaning cycle wherein soiled garments are agitated in drycleaning solvent in each of the phases by mixing the solvent of a first phase with a detergent having a substantivity for the garments, removing the solvent of the first phase from the garments while the detergent is substantively retained by the garments and combining the solvent of a second phase with the garments containing the detergent for continued cleaning.
Inventors
- 👤 Joseph A Piepmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:16
CPC Classifications
D; D06; D06L; D06L1/00; D06L1/02; D06L1/04; D06L1/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
13 words
The process according to claim 1 wherein said detergent is a cationic detergent.
Claim 2
Dependent Claim
22 words
The process according to claim 2 wherein said cationic detergent is selected from the group consisting of betaines and quaternary ammonium compounds.
Claim 3
Dependent Claim
26 words
The process according to claim 1 wherein said detergent is present in an amount of from about 0.01 to 5.0 ounces per pound of garment load.
Claim 4
Dependent Claim
26 words
The process according to claim 4 wherein said detergent is present in an amount of from about 0.1 to 1.0 percent by volume of said solvent.
Claim 5
Dependent Claim
38 words
The process according to claim 1 wherein water is also mixed with the dry cleaning solvent of said first phase in an amount of from about 0.1 to about 1 ouncE of water per pound of garment load.
Claim 6
Dependent Claim
19 words
The process according to claim 6 wherein said water is added to said detergent before mixing with said solvent.
Claim 7
Dependent Claim
24 words
The process according to claim 7 wherein said detergent is a cationic detergent selected from the group consisting of betaines and quaternary ammonium compounds.
Claim 8
Dependent Claim
31 words
The process according to claim 1 wherein said mixing takes place in a batch operation and said solvent of the second phase is combined with said garments in a continuous operation.
Claim 9
Dependent Claim
142 words
A dry cleaning process having a plurality of phases in a cleaning cycle wherein heavily soiled garments are agitated in a hydrocarbon dry cleaning solvent in each of the phases consisting essentially of, mixing the solvent of a first phase with water and a cationic detergent having a substantivity for said garments, said detergent selected from the group consisting of betaines and quaternary ammonium compounds, extracting substantially all of the solvent of said first phase with the bulk of the soil from said garments at the end of said first phase cleaning cycle while at least a portion of said detergent is substantively retained by said garments to prevent adverse redeposition of the soil onto said garments, and combining the solvent of a second phase with said garments containing the substantively retained detergent for continued cleaning in said second phase cleaning cycle.
Claim 10
Dependent Claim
17 words
The process according to claim 10 wherein said solvent of said second phase contains a nonionic surfactant.
Claim 11
Dependent Claim
21 words
A process according to claim 11 wherein the ratio of detergent of said nonionic surfactant is from about 1:20 to 6:2.
Claim 12
Dependent Claim
66 words
The process according to claim 10 wherein said detergent is present in an amount of from about 0.01 to 5.0 ounces per pound of garment load, said water is present in an amount of from about 0.1 to 1 ounce per pound of garment load and said solvent contains said detergent in an amount of from about 0.1 to 1 percent by volume of said solvent.
References Cited (Backward Citations)
US2165356A
Cited
US3345123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |