Production process of multivalent metal-modified salicylic acid resins, color-developing agents using the resins and suited for use in pressure-sensitive copying paper sheets and pressure-sensitive copying paper units employing the agents
A Standard patent application filed on 12 August 1988 credited to Yamaguchi, Keizaburo
;
Yamaguchi, Akihiro
;
Tanabe, Yoshimitsu
Details
Application number :
20689
Application type :
Standard
Application status :
CEASED
Under opposition :
No
Proceeding type :
Invention title :
Production process of multivalent metal-modified salicylic acid resins, color-developing agents using the resins and suited for use in pressure-sensitive copying paper sheets and pressure-sensitive copying paper units employing the agents