US2772991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of cleaning a residual powder image from an electrophotographic plate
Assignee: Xerox Corp
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Filing: 1954-12-14
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Granted: 1956-12-04
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Expires: 1974-12-14
Abstract
No abstract record available.
Inventors
- 👤 Michael A Insalaco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:11
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/005; G03G21/00; G03G21/0005; G03G21/0047; G03G2221/00; G03G2221/0005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
THE PROCESS OF CLEANING A RESIDUAL POWDER IMAGE FROM AN ELEMENT COMPRISING A PHOTOCONDUCTIVE INSULATING LAYER ON A CONDUCTIVE BACKING CARRYING SUCH IMAGE, WHICH PROCESS COMPRISES PASSING ACROSS SAID PHOTOCONDUCTIVE INSULATING SURFACE A MIXTURE OF FINELY-DIVIDED BARIUM SULFATE AND A WATER INSOLUBLE METAPHOPHATE SALT.
Claim 2
Dependent Claim
44 words
THE PROCESS OF CLEANING A RESIDUAL POWDER IMAGE FROM AN ELEMENT COMPRISING A PHOTOCONDUCTIVE INSULATING LAYER ON A CONDUCTIVE BACKING CARRYING SUCH IMAGE, WHICH PROCESS COMPRISES PASSING ACROSS SAID PHOTOCONDUCTIVE INSULATING SURFACE A MIXTURE OF FINELY-DIVIDED BARIUM SULFATE AND A WATER INSOLUBLE METAPHOPHATE SALT.
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) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |