Title:
Production of color photographic images
United States Patent 2619419

Inventors:
Joseph, Jennen Jacob
Publication Date:
11/25/1952
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Assignee:
GEVAERT PHOTO PROD NV
Primary Class:
430/386
Other Classes:
430/555, 430/474, 548/371.100, 544/284, 548/156, 548/121, 548/365.100, 430/558, 548/368.700, 548/364.100, 430/476, 546/162, 548/222, 548/194, 548/219, 546/276.100, 548/161, 548/368.400
International Classes:
G03C7/384; G03C7/38
US Patent References:
2343704Heterocyclic substituted iminopyrazolone coupler
2376380