US3632337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
An electrostatic imaging process wherein the developer includes boron nitride
Assignee: International Business Machines Corp
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Filing: 1970-02-02
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Granted: 1972-01-04
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Expires: 1990-02-02
Abstract
Abstract Wetting by toners of the surface of reusable photoconductors in electrophotographic processes results in image cycling in adhesion of the toner to the photoconductor surface to form a film. Such filming is reduced or eliminated by introducing into the system a small amount of boron nitride.
Inventors
- 👤 Walter Crooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:30
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/097; G03G9/09708; G03G5/00; G03G5/005; G03G5/14; G03G5/147; G03G5/14704
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A process claimed in claim 1 wherein the boron nitride is applied as particles less than 5 microns in size mixed with the developer material.
Claim 2
Dependent Claim
28 words
A process as claimed in claim 1 wherein boron nitride is applied to a cleaning brush which is in contact with the surface of the photo conductive plate.
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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |