Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2008-03-18
2008-03-18
Boykin, Terressa (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C264S176100, C264S219000, C502S150000, C502S208000, C528S198000
Reexamination Certificate
active
07345133
ABSTRACT:
A branched polycarbonate and processes for its preparation are disclosed. The polycarbonate contains structural units conforming toin which R1, R2, R3and R4mutually independently denote C1-C10alkyl, R5, R6and R7mutually independently denote hydrogen or C1-C10alkyl, or R1and R2, and R3and R4, with the carbon atom to which they are attached, form a C5-C10cycloalkyl group, wherein the cycloalkyl group may be substituted.
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Blaschke Ulrich
Erkelenz Michael
Heuer Helmut-Werner
Wehrmann Rolf
Bayer MaterialScience AG
Boykin Terressa
Cheung Noland J.
Preis Aron
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