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US3705802A Expired / Lapsed US ⏱️ 0.0 years remaining

Novel photographic processing compositions and improved processing using such compositions for preparing silver auxiliary and sound records

Assignee: Eastman Kodak Co
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Filing: 1971-12-17
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Granted: 1972-12-12
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Expires: 1991-12-17
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Abstract

Abstract NOVEL PHOTOGRAPHIC PROCESSING COMPOSITIONS FOR PREPARING SILVER AUXILIARY IMAGES AND SILVER SOUND TRACKS ARE PROVIDED WHICH CONTAIN A BALLASTED SILVER BLEACH INHIBITOR AND A SILVER ALIDE SOLVENT. ALSO PROVIDED ARE IMPROVED PROCESSES FOR PRODUCING A SILVER AUXILIARY IMAGE OR SILVER SOUND RECORD IN AN EXPOSED PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING COATED THEREON AT LEAST ONE PICTURE RECORDING PHOTOGRAHIC SILVER HALIDE LAYER AND AS THE LIGHT SENSITIVE LAYER OUTERMOST FORM THE SUPPORT AN AUXILIARY IMAGE-RECORDING SILVER HALIDE LAYER WHICH DOES NOT FORM AN IMAGE UPON IMAGE-FORMING EXPOSURE OF THE PICTURE RECORDING LAYER OR LAYERS WHICH COMPRISES (A) DEVELOPING A PICTURE RECORD COMPRISING SILVER AND DYE AND AN AUXILIARY OR SOUND RECORD COMPRISING SILVER, (B) CONTACTING THE AUXILIARY LAYER WHICH A BALLASTED SILVER BLEACH INHIBITOR TO ADSORB THE BLEACH INHIBITOR ONTO AT LEAST THE SILVER OF THE AUXILIARY LAYER ANC (C) REMOVING THE BLEACHABLE SILVER AND THE RESIDUAL SILVER HALIDE WHICH IMPROVEMENT COMPRISES CARRYING OUT STEP (B) IN THE PRESENCE OF A SILVER HALIDE SOLVENT.

Inventors

  • 👤 John L Baptista

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 17:01
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/22; G03C7/24

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) 1975-12-12 1976-06-12 1976-12-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-12-12 1980-06-12 1980-12-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-12-12 1984-06-12 1984-12-12 $7700.00 Window Closed / Lapsed

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