Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2008-04-08
2008-04-08
Boykin, Terressa (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C525S439000, C528S198000, C528S288000, C528S310000, C556S418000, C556S437000
Reexamination Certificate
active
07354986
ABSTRACT:
A copolycarbonate of the formulawherein 5 to 75 mole percent of the total number of R1groups is derived from a high Tg monomer of formula (2)wherein R2and R3are each independently a halogen or a C1-6alkyl group, R4is a methyl or phenyl, and c is 0 to 4; and 25 to 95 mole percent of the R1groups are derived from a dihydroxy compound of formula HO—R5—OH, wherein at least 60% of the R5groups are aromatic, and the dihydroxy compound of formula (3) is not the same as the high Tg monomer of formula (2), and wherein the copolycarbonate comprises at least 10% fewer carbonate linkages of formula (4)than would be theoretically obtained in a random copolymer made from the same ratio of the high Tg monomer of formula (2) and the dihydroxy compound of formula (3).
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Mahood James A.
Malinoski Jon M.
Boykin Terressa
General Electric Company
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