US3615420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic process and element employing a conductive layer of etherified starch or cellulose
Assignee: GAF Corp
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Filing: 1968-12-12
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Granted: 1971-10-26
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Expires: 1988-12-12
Abstract
Abstract A process of visible image formation which comprises exposing a photoconductor layer having a high dark resistivity to electromagnetic radiation having a wavelength extending from the ultraviolet through the visible region said photoconductor layer being dispersed in electrically conducting contact with a layer comprising etherified starch or cellulose, as for example, hydroxyalkyl starch or alkoxy-cellulose, or unsymmetrical ethers of the form R-O-R1 wherein R and R1 are alkyl or aryl groups having at least one substituent which is of electron-withdrawing character.
Inventors
- 👤 Albert S Deutsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:20
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
14 words
A process according to claim 1 wherein said film-forming binder comprises a silicone resin.
Claim 2
Dependent Claim
14 words
A process according to claim 1 wherein said photoconductive support comprises an aluminum sheet.
Claim 3
Dependent Claim
13 words
A process according to claim 1 wherein said etherified material is hydroxypropyl starch.
Claim 4
Dependent Claim
124 words
An image-forming element comprising (1) a photoconductor layer comprising zinc oxide dispersed in a film-forming binder contiguous thereto, (2) an etherified layer comprising an ether of the general formula: R-O-R1 where R and R1 are members selected from the class consisting of alkyl, substituted alkyl, monocyclic aryl, substituted monocyclic aryl, a starch radical and a cellulose radical, such that when any one of R and R1 is a member selected from the class consisting of a starch radical and cellulose radical, the remaining moiety is a group other than starch and cellulose and such that, in the absence of a starch and cellulose group, at least one of R and R1 contain a substituent which is of electron-withdrawing character, and (3) a conductive support.
Claim 5
Dependent Claim
12 words
An element according to claim 5 wherein said conductive support comprises aluminum.
Claim 6
Dependent Claim
13 words
An element according to claim 5 wherein said etherified layer comprises hydroxyporpyl starch.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |