Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2008-01-08
2008-01-08
Boykin, Terressa (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C524S147000, C524S302000, C524S323000, C528S198000, C528S202000, C528S204000
Reexamination Certificate
active
07317067
ABSTRACT:
An object of the present invention is to provide a polycarbonate copolymer having excellent heat resistance and dimensional stability and heat resistant parts comprising the copolymer and suitable for use in various applications. The present invention is a polycarbonate copolymer comprising 5 to 95 mol % of recurring unit (component a) represented by the following general formula (I):and 95 to 5 mol % of recurring unit (component b) represented by the following general formula (II):(wherein Rato Rdare each independently a hydrogen atom, a hydrocarbon group which may contain an aromatic group having 1 to 9 carbon atoms or a halogen atom, and W is a single bond, a hydrocarbon group which may contain an aromatic group having 1 to 20 carbon atoms or an O, SO, SO2, CO or COO group), and various heat resistant parts comprising the copolymer.
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Ando Masato
Ikeda Koki
Okamoto Yoshimasa
Tokuda Toshimasa
Boykin Terressa
Teijin Chemicals
Wenderoth , Lind & Ponack, L.L.P.
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