Title:
Photographic reducing composition and process
United States Patent 2339309

Inventors:
Rau, Weber John
Barratt, Morris Lynn
Publication Date:
01/18/1944
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Assignee:
Pont DU.
Primary Class:
430/367
Other Classes:
430/435, 430/465, 430/484, 430/433, 430/407, 430/394
International Classes:
G03C5/30; G03C5/42; G03C5/50; G03C5/40