Patent US4049505A successfully refreshed from Google Patents.
US4049505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoconductors for electrostatic imaging systems
Assignee: Individual
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Filing: 1976-04-12
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Granted: 1977-09-20
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Expires: 1996-04-12
Abstract
Abstract In one embodiment an improved photoconductor is produced by applying a layer of selenium to a substrate, and then diffusing arsenic into the selenium layer by an electrolytic process in which the arsenic and the coated substrate are suspended in a heated, fluoride salt bath, and a DC voltage is applied across the arsenic and the selenium layer to effect diffusion of the former into the latter. In another embodiment a layer of cadmium sulfide is applied to a substrate and silver or copper is diffused into the cadmium sulfide layer by an electrolytic process.
Inventors
- 👤 Arun K. Chatterji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:48
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/66
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
69 words
The method of producing an alloyed photoconductor, comprising applying a layer of photoconductive material to a substrate, and diffusing an alloying metal into said layer by an electrolytic process, including placing the alloying metal and said layer in a heated, molten fluoride salt bath as the anode and cathode, respectively, applying a DC voltage across said anode and said cathode, and conducting said electrolytic process in an inert atmosphere.
Claim 2
Independent Claim
69 words
The method of producing an alloyed photoconductor, comprising applying a layer of photoconductive material to a substrate, and diffusing an alloying metal into said layer by an electrolytic process, including placing the alloying metal and said layer in a heated, molten fluoride salt bath as the anode and cathode, respectively, applying a DC voltage across said anode and said cathode, and conducting said electrolytic process in an inert atmosphere.
Claim 3
Dependent Claim
19 words
The method as defined in claim 1, wherein said photoconductive material is selenium and said alloying metal is arsenic.
Claim 4
Dependent Claim
24 words
The method as defined in claim 2 wherein the molten fluoride salt bath is maintained at a temperature between 300° C. to 1350° C.
Claim 5
Dependent Claim
20 words
The method as defined in claim 1, wherein said photoconductive material is cadmium sulfide, and said alloying metal is silver.
Claim 6
Dependent Claim
20 words
The method as defined in claim 4, wherein said molten fluoride salt bath comprises a mixture of NaF and AgF.
Claim 7
Dependent Claim
20 words
The method as defined in claim 1, wherein said photoconductive material is cadmium sulfide, and said alloying metal is copper.
Claim 8
Dependent Claim
20 words
The method as defined in claim 6, wherein said molten salt bath comprises a mixture of KHF 2 and NaF.
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) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |