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US3666458A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for transferring electrostatic charge images

Assignee: Kalle GmbH and Co KG
•
Filing: 1969-11-24
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Granted: 1972-05-30
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Expires: 1989-11-24
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Abstract

Abstract THIS INVENTION RELATES TO PROCESS FOR THE ELECTROPHOTOGRAPHIC PRODUCTION OF COPIES BY TRANSFERRING AN ELECTROSTATIC CHARGE IMAGE FROM A PHOTOCONDUCTOR LAYER ON A CONDUCTIVE SUPPORT ONTO A DIELECTRIC LAYER ON A CONDUCTIVE SUPPORT, THE DIELECTRIC LAYER BEING IN VIRTUAL CONTACT WITH THE PHOTOCONDUCTOR LAYER, SEPARATING THE LAYERS FROM EACH OTHER, DEVELOPING THE TRANSFERRED LATENT CHARGE IMAGE BY ELECTROPHOTOGRAPHIC DRY OR LIQUID DEVELOPMENT, AND THEN FIXING THE SAME IF DESIRED, THE PHOTOCONDUCTOR LAYER COMPRISING ORGANIC CHARGE TRANSFER COMPLEXES AND BEING CAPABLE, IN A THICKNESS OF 8 TO 15U, OF BEING CHARGED TO 800 TO 1,600 VOLTS AND THE EXPOSED LAYER HAVING A VOLTAGE OF AT LEAST ABOUT 500 VOLTS IN THE IMAGE AREAS AND NOT MORE THAN ABOUT 300 VOLTS IN THE NON-IMAGE AREAS.

Inventors

  • 👤 Reinhold Arneth
  • 👤 Hans Trittler
  • 👤 Jurgen Emig

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 21:10
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/14; G03G13/18; G03G13/22; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0618; G03G5/07; G03G5/071

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) 1975-05-30 1975-11-29 1976-05-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-05-30 1979-11-29 1980-05-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-05-30 1983-11-29 1984-05-30 $7700.00 Window Closed / Lapsed

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