US PATENT SUBCLASS 106 / 31.22
.~.~.~.~.~.~.~ Fluoran or derivative containing

Current as of: June, 1999
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106 /   HD   COMPOSITIONS: COATING OR PLASTIC

*  DD  COATING OR PLASTIC COMPOSITIONS {40}
31.01  DF  .~ Marking {14}
31.13  DF  .~.~ Inks {6}
31.14  DF  .~.~.~ Invisible {4}
31.16  DF  .~.~.~.~ Chromogenic (i.e., color formation by reaction of color former with color developer) {2}
31.2  DF  .~.~.~.~.~ Specified color former (i.e., electron donating) {1}
31.21  DF  .~.~.~.~.~.~ The color former contains a heterocyclic oxygen ring {1}
31.22.~.~.~.~.~.~.~ Fluoran or derivative containing

DEFINITION

Classification: 106/31.22

Fluoran or derivative containing:

(under subclass 31.21) Compositions wherein the color former contains a fluoran or derivative thereof.