Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Nitrogen-containing reactant
Reexamination Certificate
2005-12-13
2005-12-13
Seidleck, James J. (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Nitrogen-containing reactant
C528S192000, C528S193000, C528S194000, C528S224000
Reexamination Certificate
active
06974857
ABSTRACT:
An end-capped quinoxaline-containing hyperbranched ether-ketone polymer having repeating units of the formula:wherein n represents the degree of polymerization for the parent hyperbranched polymer, x represents the degree of endgroup functionalization, x has a value of 0.05 to 1.0, and G is selected from the group consisting ofand alkyl having 2 to 16 carbon atoms, and a method for preparing the polymer are provided.
REFERENCES:
patent: 6608171 (2003-08-01), Tan et al.
patent: 6639042 (2003-10-01), Baek et al.
patent: 6642347 (2003-11-01), Baek et al.
patent: 6743889 (2004-06-01), Tan et al.
patent: 6849707 (2005-02-01), Baek et al.
Jong-Beom Baek, Loon-Seng Tan, Improved syntheses of poly(oxy-1,3-phenylenecarbonyl-ly4-phenylene) and□□related polytether-ketones) using polyphosphoric acid/P2O5 as polymerization medium, Polymer, 44 (2003)□□4135-4147, published Jul. 2003.
Jong-Beom Baek, Loon-Seng Tan, Synthesis of Hyperbranched Poly(Ether-Ketone)□□Containg Quinoxaline Moieth From An AB2 Monomer in Polyphosphoric AcidP2O5,□□Polymer Preprints, 2002, 43(1), 4-515, published in Mar. 2002.
Baek Jong-Beom
Tan Loon-Seng
AFMCLO/JAZ
Bricker Charles E.
Seidleck James J.
The United States of America as represented by the Secretary of
Zemel Irina S.
LandOfFree
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