Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2007-06-26
2007-06-26
Boykin, Terressa (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
C525S437000
Reexamination Certificate
active
10513659
ABSTRACT:
A polyester expressed by the following structural formula 1, and a charge transport material obtained by adding an electron acceptor compound or an electron donor compound to this polyester.In the aforesaid structural formula, Ar is an aromatic group and this aromatic group may contain a heterocyclic ring.R1is a carbon atom or absent (direct bond), R2–R9are hydrogen atoms, electron donor groups or electron attracting groups, R20, R21are hydrogen atoms or organic groups, X is a hetero atom, hetero atom-containing group, organic group or absent (direct bond), and m is an integer equal to 2 or more.
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Boykin Terressa
Japan Science and Technology Corporation
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