US3655376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic denitrified glass binder plate
Assignee: Xerox Corp
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Filing: 1970-05-20
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Granted: 1972-04-11
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Expires: 1990-05-20
Abstract
Abstract A xerographic plate comprising a two-phase layer one component of which is a photoconductive metal oxide which has been recrystallized in a glassy binder. The two-phase photoconductive plate is prepared by mixing a major proportion of the photoconductive metal oxide and minor proportions of other glass formers, fusing the mixture and cooling it so as to form a single glass phase, and then heat treating the single phase glass so as to precipitate the metal oxide as finely divided, uniformly dispersed particles.
Inventors
- 👤 Charles Wood
- 👤 John C Schottmiller
- 👤 Rustum Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:18
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/085
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
32 words
The method of claim 9 wherein the mixture additionally includes a minor proportion of an additive selected from the group consisting essentially of Mg0, Li20, Na20, K20, Ca0, Sr0 and mixtures thereof.
Claim 2
Dependent Claim
38 words
The process of claim 9 wherein the Pb0 is in a concentration of from about 65 to 75 mole percent, and the reheating takes place at a temperature of at least 425* C for at least 2 hours.
Claim 3
Dependent Claim
9 words
The plate produced for the process of claim 9.
Claim 4
Dependent Claim
84 words
The preparation of an electrophotographic composition comprising: a. providing a mixture of Pb0, A1203, and Si02, in concentrations corresponding to the area encompassed by points 18-23-19-20-21-22 of the ternary diagram in the drawing; b. heating said mixture above the melting points of the ingredients; c. cooling said mixture whereby single phase glassy body is formed; and d. reheating said body to a temperature of at least 425* C for at least 2 hours wherein the Pb0 precipitates the finely divided, uniformly distributed crystal phase.
Claim 5
Dependent Claim
9 words
The product produced by the process of claim 5.
References Cited (Backward Citations)
US2956219A
Cited
US2889952A
Cited
US2920971A
Cited
US2951167A
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US3149016A
Cited
US3151982A
Cited
US3291586A
Cited
US3238151A
Cited
US3486871A
Cited
US3507646A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |