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US3843367A Expired / Lapsed US ⏱️ 0.0 years remaining

Photographic color developing process

Assignee: Agfa Gevaert AG
•
Filing: 1972-06-09
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Granted: 1974-10-22
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Expires: 1992-06-09
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Abstract

Abstract 1. THE PROCESS FOR THE PRODUCTION OF COLORED PHOTOGRAPHIC IMAGES INCLUDING THE STEPS OF IMAGEWISE EXPOSING A COLOR PHOTOGRAPHIC MATERIAL CONTAINING AT LEAST ONE SILVER HALIDE LAYER, DEVELOPING THE EPOSED MATERIAL WITH COLOR-DEVELOPER TO FORM THE DYE-IMAGE IN THE PRESENCE OF COLOR-COUPLLERS AND TREATING THE MATERIAL WITH A BATH THAT BLEACHES AND FIXES THE DEVELOPED MATERIAL TO REMOVE DEVELOPED SILVER AND RESIDUAL SILVER HALIDE, WHEREIN THE IMPROVEMENT COMPRISES THE BLEACHING OF THE DEVELOPED MATERIAL IS IN THE PRESENCE OF A WATER-SOLUBLE OXIME IN THE BATH, CORRESPONDING TO THE FOLLOWING FORMULA: (-R1-R2-)>C=N-OH IN WHICH R1=HYDROGEN OR AN ALIPHATIC GROUP WITH UP TO 12 CARBON ATOMS AND R2=AN ALIPHATIC GROUP WITH UP TO 12 CARBON ATOMS OR R1 AND R2 TOGETHER REPRESENT THE RING MEMBERS REQUIRED TO COMPLETE A SATURATED CARBOCYCLIC OR HETEROCYCLIC 5- OR 6-MEMBERED RING, THE AMOUNT OF OXIME BEING SUCH THAT IT REDUCES THE FORMATION OF COLOR FOG DURING BLEACHING.

Inventors

  • 👤 K Schranz
  • 👤 E Schon
  • 👤 W Hunicke

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 18:37
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/42; G03C7/421

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 89 words
THE PROCESS FOR THE PRODUCTION OF COLORED PHOTOGRAPHIC IMAGES INCLUDING THE STEPS OF IMAGEWISE EXPOSING A COLOR PHOTOGRAPHIC MATERIAL CONTAINING AT LEAST ONE SILVER HALIDE LAYER, DEVELOPING THE EPOSED MATERIAL WITH COLOR-DEVELOPER TO FORM THE DYE-IMAGE IN THE PRESENCE OF COLOR-COUPLLERS AND TREATING THE MATERIAL WITH A BATH THAT BLEACHES AND FIXES THE DEVELOPED MATERIAL TO REMOVE DEVELOPED SILVER AND RESIDUAL SILVER HALIDE, WHEREIN THE IMPROVEMENT COMPRISES THE BLEACHING OF THE DEVELOPED MATERIAL IS IN THE PRESENCE OF A WATER-SOLUBLE OXIME IN THE BATH, CORRESPONDING TO THE FOLLOWING FORMULA:
Claim 2
Dependent Claim 89 words
THE PROCESS FOR THE PRODUCTION OF COLORED PHOTOGRAPHIC IMAGES INCLUDING THE STEPS OF IMAGEWISE EXPOSING A COLOR PHOTOGRAPHIC MATERIAL CONTAINING AT LEAST ONE SILVER HALIDE LAYER, DEVELOPING THE EPOSED MATERIAL WITH COLOR-DEVELOPER TO FORM THE DYE-IMAGE IN THE PRESENCE OF COLOR-COUPLLERS AND TREATING THE MATERIAL WITH A BATH THAT BLEACHES AND FIXES THE DEVELOPED MATERIAL TO REMOVE DEVELOPED SILVER AND RESIDUAL SILVER HALIDE, WHEREIN THE IMPROVEMENT COMPRISES THE BLEACHING OF THE DEVELOPED MATERIAL IS IN THE PRESENCE OF A WATER-SOLUBLE OXIME IN THE BATH, CORRESPONDING TO THE FOLLOWING FORMULA:

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) 1977-10-21 1978-04-22 1978-10-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-10-21 1982-04-22 1982-10-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-10-21 1986-04-22 1986-10-22 $7700.00 Window Closed / Lapsed

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