US3834930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of developing electrostatographic images
Assignee: Xerox Corp
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Filing: 1972-09-25
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Granted: 1974-09-10
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Expires: 1992-09-25
Abstract
Abstract A METHOD OF DEVELOPMENT OF AN ELECTROSTAIC LATENT IMAGE IS GIVEN WHEREIN A CHEMICALLY STABLE, NONAQUEOUS, AMBIPOLAR, LIQUID DEVELOPER COMPRISING AN OLEAGINOUS VEHICLE, SOLID COLORAT PARTICLES, A DISPERSANT SOLUBLE IN THE LIQUID DEVELOPER WHICH IS CAPABLE OF SUBSTANTIALLY SUPPRESSING BACKGROUND DEPOSITS, AND A FIXING AGENT MISCIBLE WITH THE LIQUID WHICH PENETRATES THE COPY PAPER IS EMPLOYED TO DEVELOP AN ELECTROSTATIC LATENT IMAGE BY PRESENTING THE DEVELOPER TO THE IMAGE BEARING SURFACE BY AN APPLICATOR HAVING A SUBSTANTIALLY UNIFORMLY PATTERNED SURFACE OF RAISED PORTIONS AND DEPRESSED PORTIONS WHICH CONTAIN THE DEVELOPER.
Inventors
- 👤 A Amidon
- 👤 J Mammino
- 👤 R Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:30
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/101; G03G15/102; G03G9/00; G03G9/16; G03G9/18
Claims Analysis
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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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |