US3959934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and method for repairing selenium photoreceptors
Assignee: Xerox Corp
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Filing: 1974-10-04
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Granted: 1976-06-01
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Expires: 1994-10-04
Abstract
Abstract Disclosed is a composition and method for repairing a damaged electrostatographic photoreceptor comprised of a conductive substrate with a uniform layer of selenium or a selenium alloy on its surface. Scratches in the selenium layer of a depth less than its total thickness are polished with the instant composition whereby the affected surface area is buffed to a smooth finish. After application of the polish composition, the electrostatic effects of the original scratch are eliminated and the repaired photoreceptor will provide copies in which printout in the repaired areas is of the same quality as in the non-damaged areas.
Inventors
- 👤 John Frank Byrne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:20
CPC Classifications
B; B24; B24B; B24B1/00; G; G03; G03G; G03G5/00; G03G5/005
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
53 words
A composition for repairing damaged selenium photoreceptors comprising: a. zinc oxide; b. a secondary suspending agent selected from the group consisting of silica aerogels and colloidal silicas; and c. an abrasive; all three items being suspended in an organic liquid medium selected from the group consisting of liquid hydrocarbons, alcohols and mixtures thereof;
Claim 2
Dependent Claim
53 words
A composition for repairing damaged selenium photoreceptors comprising: a. zinc oxide; b. a secondary suspending agent selected from the group consisting of silica aerogels and colloidal silicas; and c. an abrasive; all three items being suspended in an organic liquid medium selected from the group consisting of liquid hydrocarbons, alcohols and mixtures thereof;
Claim 3
Dependent Claim
10 words
The composition of claim 1 wherein the abrasive is feldspar.
Claim 4
Dependent Claim
28 words
The composition of claim 1 wherein the liquid medium comprises isopropyl alcohol and a kerosene based liquid in a respective weight ratio of up to 5 to 1.
Claim 5
Dependent Claim
21 words
The composition of claim 2 wherein the abrasive and the suspending agents are present in sufficient amounts to form a paste.
Claim 6
Independent Claim
100 words
A method for repairing a damage area on a selenium photoreceptor comprising: a. providing a polish composition including (i) zinc oxide, (ii) a secondary suspending agent selected from the group consisting of silica aerogels and colloidal silicas and an abrasive, all three materials being suspended in an organic liquid medium selected from the group consisting of liquid hydrocarbons, alcohols and mixtures thereof; b. applying the polish composition to a physically damaged area of a selenium photoreceptor; and c. rubbing the polish composition about the damaged area so as to effect a smoothing of the physically damaged area of the photoconductor.
Claim 7
Independent Claim
100 words
A method for repairing a damage area on a selenium photoreceptor comprising: a. providing a polish composition including (i) zinc oxide, (ii) a secondary suspending agent selected from the group consisting of silica aerogels and colloidal silicas and an abrasive, all three materials being suspended in an organic liquid medium selected from the group consisting of liquid hydrocarbons, alcohols and mixtures thereof; b. applying the polish composition to a physically damaged area of a selenium photoreceptor; and c. rubbing the polish composition about the damaged area so as to effect a smoothing of the physically damaged area of the photoconductor.
Claim 8
Dependent Claim
10 words
The method of claim 5 wherein the abrasive is feldspar.
Claim 9
Dependent Claim
28 words
The composition of claim 5 wherein the liquid medium comprises isopropyl alcohol and a kerosene based liquid in a respective weight ratio of up to 5 to 1.
Claim 10
Dependent Claim
21 words
The composition of claim 5 wherein the abrasive and the suspending agents are present in sufficient amounts to form a paste.
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) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |