Photographic process and emulsion utilizing cation-active surface active agents
United States Patent 2197809
Inventors:
Mcqueen, David M.
Publication Date:
04/23/1940
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Assignee:
PONT FILM MFG CORP DU
Primary Class:
Other Classes:
430/401, 430/631, 430/446, 430/581, 430/493
International Classes:
G03C1/38; G03C5/305