US3682678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of developing electrostatic images
Assignee: International Business Machines Corp
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Filing: 1969-10-24
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Granted: 1972-08-08
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Expires: 1989-10-24
Abstract
Abstract METHOD AND APPARATUS FOR FUR BRUSH DEVELOPMENT OF ELECTROSTATIC IMAGES ON AN INSULATING SURFACE. MECHANICAL SEPARATORS SEPARATE THE FUR BRUSH FIBERS TO PRESENT UNMATTED TONER-CARRYING FUR FIBERS FOR CONTACT WITH AN ELECTROPLATE SURFACE. ALTERNATIVELY, THE TONER-CARRYING FUR BRUSH MATERIAL MAY BE ELASTICALLY STRETCHED OVER A MANDREL THROUGH AN ANGLE SUFFICIENT TO SEPARATE THE FIBERS, TO PREVENT MATTING, INDEPENDENT OF HUMIDITY OR WEAR CONDITIONS, TO PRESENT UNMATTED FUR FIBERS FOR CONTACT WITH AN ELECTROPLATE SURFACE.
Inventors
- 👤 Yaqub Moradzadeh
- 👤 Albert C Bettiga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:42
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0805
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |