US3937665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoreceptor solvent cleaner
Assignee: Xerox Corp
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Filing: 1975-02-27
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Granted: 1976-02-10
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Expires: 1995-02-27
Abstract
Abstract A photoreceptor cleaning composition is provided which includes a solvent blend that is capable of dissolving toner polymers and paper tars. This composition cleans effectively and efficiently without damage to the photoreceptor and without leaving residue. This solvent employs a blend of halogenated hydrocarbons having specific physical and chemical properties. These compositions are superior to known cleaners by virtue of their minimizing potential for fire explosion and hazard resulting from toxicity and volatility.
Inventors
- 👤 Joseph Mammino
- 👤 Franklin Jossel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:02
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/005; C; C11; C11D; C11D7/00; C11D7/50; C11D7/5004; C11D7/5018; C11D7/22; C11D7/24; C11D7/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
63 words
A method of cleaning photoreceptor surfaces comprising providing a filmed photoreceptor surface, applying a photoreceptor cleaning solution which comprises a solvent blend capable of dissolving toner polymers and paper tars, said blend comprising a halogenated hydrocarbon exhibiting no flash point, as determined by TAG Open Cup, ASTM Method D-1310 and a petroleum hydrocarbon having a closed cup flash point of over about 135°F.
Claim 2
Independent Claim
63 words
A method of cleaning photoreceptor surfaces comprising providing a filmed photoreceptor surface, applying a photoreceptor cleaning solution which comprises a solvent blend capable of dissolving toner polymers and paper tars, said blend comprising a halogenated hydrocarbon exhibiting no flash point, as determined by TAG Open Cup, ASTM Method D-1310 and a petroleum hydrocarbon having a closed cup flash point of over about 135°F.
Claim 3
Dependent Claim
14 words
The process as defined in claim 1 wherein said halogenated hydrocarbon comprises 1,1,1 trichloroethane.
Claim 4
Dependent Claim
35 words
The process as defined in claim 1 wherein said petroleum hydrocarbon is water-white petroleum solvent prepared from crude oil by straight run overhead distillation, said solvent having been treated for deodorization by a depolarization process.
Claim 5
Dependent Claim
22 words
The process as defined in claim 1 wherein the ratio of said halogenated hydrocarbon to said petroleum hydrocarbon is 99:1 to 50:50.
Claim 6
Dependent Claim
20 words
The process as defined in claim 4 wherein the ratio of said halogenated hydrocarbon to said petroleum hydrocarbon is 93:7.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |