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US3259497A Expired / Lapsed US ⏱️ 0.0 years remaining

Photographic color reversal process

Assignee: BASF Schweiz AG
•
Filing: 1962-08-29
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Granted: 1966-07-05
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Expires: 1982-08-29
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Abstract

No abstract record available.

Inventors

  • 👤 Wartburg Rene Von

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 15:15
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/28

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 164 words
IN A PROCESS FOR THE PRODUCTION OF A COLOR IMAGE THAT IS OPPOSITE TO THE MASTER BY THE SILVER DYE BLEACHING METHOD IN AN AT LEAST SINGLE-LAYER MATERIAL, WHICH CONTAINS AT LEAST ONE SILVER HALIDE EMULSION AND AT LEAST ONE DYE WHICH IS SENSITIVE TO OXIDATION, FAST TO DIFFUSION, AND CAN BE BLEACHED BY THE SILVER DYE BLEACHING PROCESS, BY EXPOSURE, PRIMARY DEVELOPMENT, REMOVAL OF THE PRIMARILY DEVELOPED SILVER IN AN OXIDATION BATH CONTAINING SULFURIC ACID AND AN OXIDANT SELECTED FROM THE GROUP OF HEPTAVALENT MANGANESE COMPOUNDS, HEXAVALENT CHROMIUM COMPOUNDS, HYDROGEN PEROXIDE DERIVATIVES AND TERVALENT CERIUM COMPOUNDS, SECONDARY DEVELOPMENT, DYE BLEACHING AND REMOVAL OF THE RESIDUAL SILVER, THE STEP WHICH COMPRISES CARRYING OUT THE REMOVAL OF THE PRIMARILY DEVELOPED SILVER IN THE PRESENCE OF A WATER SOLUBLE ORGANIC COMPOUND CONTAINING AT LEAST ONE BASIC NITROGEN ATOM SELECTED FROM THE GROUP CONSISTING OF ETHYLENEDIAMINE, BENZTRIAZOLE DERIVATIVES, GUANIDINE DERIVATIVES, BIGUANIDE DERIVATIVES, PYRIDINE DERIVATIVES, QUINOLINE DERIVATIVES, BENZTHIAZOLE DERIVATIVES, PIPERIDINE DERIVATIVES, BENZYL TRIMETHYL AMMONIUM CHLORIDE AND TETRA-N-BUTYL-AMMONIUM BROMIDE.
Claim 2
Dependent Claim 164 words
IN A PROCESS FOR THE PRODUCTION OF A COLOR IMAGE THAT IS OPPOSITE TO THE MASTER BY THE SILVER DYE BLEACHING METHOD IN AN AT LEAST SINGLE-LAYER MATERIAL, WHICH CONTAINS AT LEAST ONE SILVER HALIDE EMULSION AND AT LEAST ONE DYE WHICH IS SENSITIVE TO OXIDATION, FAST TO DIFFUSION, AND CAN BE BLEACHED BY THE SILVER DYE BLEACHING PROCESS, BY EXPOSURE, PRIMARY DEVELOPMENT, REMOVAL OF THE PRIMARILY DEVELOPED SILVER IN AN OXIDATION BATH CONTAINING SULFURIC ACID AND AN OXIDANT SELECTED FROM THE GROUP OF HEPTAVALENT MANGANESE COMPOUNDS, HEXAVALENT CHROMIUM COMPOUNDS, HYDROGEN PEROXIDE DERIVATIVES AND TERVALENT CERIUM COMPOUNDS, SECONDARY DEVELOPMENT, DYE BLEACHING AND REMOVAL OF THE RESIDUAL SILVER, THE STEP WHICH COMPRISES CARRYING OUT THE REMOVAL OF THE PRIMARILY DEVELOPED SILVER IN THE PRESENCE OF A WATER SOLUBLE ORGANIC COMPOUND CONTAINING AT LEAST ONE BASIC NITROGEN ATOM SELECTED FROM THE GROUP CONSISTING OF ETHYLENEDIAMINE, BENZTRIAZOLE DERIVATIVES, GUANIDINE DERIVATIVES, BIGUANIDE DERIVATIVES, PYRIDINE DERIVATIVES, QUINOLINE DERIVATIVES, BENZTHIAZOLE DERIVATIVES, PIPERIDINE DERIVATIVES, BENZYL TRIMETHYL AMMONIUM CHLORIDE AND TETRA-N-BUTYL-AMMONIUM BROMIDE.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1969-07-04 1970-01-03 1970-07-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1973-07-04 1974-01-03 1974-07-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1977-07-04 1978-01-03 1978-07-05 $7700.00 Window Closed / Lapsed

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