Appeal No. 1999-1460
Application No. 08/070,859
The subject matter on appeal relates to a method of
reversible thermosensitive color recording by manifestation of
different states of a functional element which consists
essentially of two compounds. The functional element is capable
of alternatively assuming (a) a first state in which the two
compounds interact to form a regular aggregate structure or (b) a
second state in which the two compounds do not interact, and at
least one of the two compounds is in an aggregate or crystallized
state, by heating and cooling the functional element to obtain
one of said two states. More specifically, the first state
(which is a colorized state) is attained by fusing the two
compounds with the application of heat followed by rapidly
cooling the two fused compounds. The second state (which is a
decolorized state) is attained by elevating the temperature of
the two fused compounds to a temperature below the temperature at
which the two compounds are fused, thereby destroying the
aforementioned regular aggregate structure of the two compounds.
This appealed subject matter is adequately illustrated by
independent claim 1 which reads as follows:
2
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