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Derek R Callaby

David B Olson

Nusrallah Jubran

Roger A Mader

David R Boston

Daryle Hadley Busch

Norman P Sweeny

Loren D Albin

Wayne O Otteson

Robert J Lokken

Jacqueline M Furlong

This invention concerns monosubstituted dithiooxamides, and a preferred class comprises those wherein the substituent is such that the resulting dithiooxamide derivative is substantially nonvolatile at about room temperature. Preferred materials are those for which when the monosubstituent dithiooxamide is complexed with a transition metal cation, the resulting polymer is substantially a dark, i.e., preferably blue or blue-black color. Carbonless paper constructions involving use of N-(monosubstituted)dithiooxamides to advantage are described.

Monosubstituted dithiooxamide compounds and their use

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Oakdale, MN, United States of America

Derek R Callaby