Title:
Nitro derivatives of benzoyl leuco methylene blue
United States Patent 2783228

Inventors:
Adams, Clyde S.
Cormack, Marjorie J.
Lou, Frazier Mary
Publication Date:
02/26/1957
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Assignee:
NCR CO
Primary Class:
544/37
International Classes:
B41M5/136; B41M5/132
Foreign References:
DE113721C
BE512300A
GB725275A