US3752666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic imaging process using carrier beads containing conductive particles
Assignee: Xerox Corp
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Filing: 1970-06-09
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Granted: 1973-08-14
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Expires: 1990-06-09
Abstract
Abstract ELECTROSTATIC LATENT IMAGES ARE DEVELOPED WITH AN ELECTROSTATOGRAPHIC DEVELOPER MIXTURE COMPRISING FINELY-DIVIDED TONER PARTICLES ELECTROSTATICALLY CLINGING TO THE SURFACE OF FROSSLY LARGER CARRIER PARTICLES, EACH OF THE CARRIER PARTICLES COMPRISING A MATRIX MATERIAL ADJACENT TO AT LEAST THE EXTERNAL SURFACE OF THE CARRIER PARTICLE, THE MATRIX CONTAINING SOLID FINELY-DIVIDED ELECTRICALLY CONDUCTIVE PARTICULATE MATERIAL.
Inventors
- 👤 R Hagenbach
- 👤 R Madrid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:48
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/10; G03G9/103; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2996
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |