Patent US2817767A successfully refreshed from Google Patents.
US2817767A
Expired / Lapsed
US
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Xerographic development
Assignee: Xerox Corp
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Filing: 1953-11-23
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Granted: 1957-12-24
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Expires: 1973-11-23
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Rosenthal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:34
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/16; G03G15/00; G03G15/06; G03G15/08; G03G15/0803; Y; Y10; Y10S; Y10S430/00; Y10S430/167; Y10S430/168
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD OF DEVELOPING A XEROGRAPHIC IMAGE PARTICULARLY USEFUL IN RADIOGRAPHIC ANALYSES COMPRISING SPRAYING A CLOUD OF LUMINESCENT FINELY DIVIDE POWER MATERIAL THROUGH A POWER SPRAY NOZZLE AND ADJACENT TO A SURFACE BEARING A XEROGRAPHIC ELECTROSTATIC LATENT IMAGE TO PRESENT A CHARGED CLOUD OF SAID POWDER MATERIAL TO THE IMAGE SURFACE, DEPOSITING SAID POWDER MATERIAL TO THE STATIC IMAGE IN CONFORMITY THEREWITH BY ELECTRICAL ATTRACTION AND EXCITING SAID POWDER WITH ULTRAVIOLET ILLUMINATION
Claim 2
Independent Claim
72 words
A METHOD OF DEVELOPING A XEROGRAPHIC IMAGE PARTICULARLY USEFUL IN RADIOGRAPHIC ANALYSES COMPRISING SPRAYING A CLOUD OF LUMINESCENT FINELY DIVIDE POWER MATERIAL THROUGH A POWER SPRAY NOZZLE AND ADJACENT TO A SURFACE BEARING A XEROGRAPHIC ELECTROSTATIC LATENT IMAGE TO PRESENT A CHARGED CLOUD OF SAID POWDER MATERIAL TO THE IMAGE SURFACE, DEPOSITING SAID POWDER MATERIAL TO THE STATIC IMAGE IN CONFORMITY THEREWITH BY ELECTRICAL ATTRACTION AND EXCITING SAID POWDER WITH ULTRAVIOLET ILLUMINATION
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) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |