US3629000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrographic printing element
Assignee: Fort James Corp
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Filing: 1965-02-12
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Granted: 1971-12-21
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Expires: 1985-02-12
Abstract
Abstract A copy sheet for electrographic printing comprising a paper base sheet, a layer of photoconductive material extending over one side of the sheet, and a dielectric coating extending over the photoconductive layer adapted to receive an image-defining electrostatic charge. The photoconductive layer is sensitized by exposure to light to render it conductive, and after such sensitizing an image-defining electrostatic charge is deposited on the dielectric layer which is developed to form a visible image.
Inventors
- 👤 Sangho E Back
- 👤 Gordon A Murdock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:02
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G5/101; G03G5/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A coated copy sheet for electrographic printing comprising a paper base sheet, a continuous photoconductive layer extending over at least one side of said sheet having a photoconductor distributed therein for imparting photoconductivity; a water-soluble conductive salt dispersed throughout said photoconductive layer; and a continuous dielectric coating extending over said photoconductive layer adapted to receive an image-defining electrostatic charge.
Claim 2
Dependent Claim
75 words
A coated copy sheet for electrographic printing comprising a paper base sheet; a continuous photoconductive layer, having a photoconductor distributed therein for imparting photoconductivity, extending over both sides of said sheet; and a conTinuous dielectric coating superimposed over the photoconductive layer on one side of the sheet only adapted to receive an image-defining electrostatic charge; the photoconductive layer extending over at least one side of said base sheet including a water-soluble conductive salt dispersed therein.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |