Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From ketone or ketene reactant
Reexamination Certificate
2005-12-20
2009-10-06
Gulakowski, Randy (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From ketone or ketene reactant
C528S373000
Reexamination Certificate
active
07598337
ABSTRACT:
Sulfonated block copolymers that may be used as membranes for fuel cells include sulfonated polyaryletherketone blocks and lightly sulfonated polyethersulfone blocks.The sulfonated polyaryletherketone blocks include structural units of formulaand the lightly sulfonated polyethersulfone blocks include structural units of formulawhereinR1, R2, R3, R4, R5and R6are independently C1-C10alkyl, C3-C12cycloalkyl, C6-C14aryl, allyl, alkenyl, alkoxy, halo, or cyano;Z, Z1and Z2are independently a direct bond or O, S, (CH2)r, (CF2)r, C(CH3)2, C(CF3)2, or a combination thereof;M is H, a metal cation, a non-metallic inorganic cation, an organic cation or a mixture thereof;a and e are independently 0 or an integer from 1 to 3;b, c, d, and f are independently 0 or an integer from 1 to 4;m, n and p are independently 0 or 1; andr is an integer from 1 to 5.
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“Characterization of Polymer Blends of Polyethersulfone/Sulfonated Polysulfone and Polyethersulfone/Sulfonated Polyetheretherketone for Direct Methanol Fuel Cell Applications”, C. Manea, M. Mulder, Journal of Membrane Science 206 (2002) 443-453.
PCT International Search Report dated Oct. 19, 2007.
Roy et al., “Influence of Chemical Composition and Sequence Length on the Transport Properties of Proton Exchange Membranes”, Journal of Polymer Science, Polymer Physics, vol. 44, pp. 2226-2239, 2006.
Brunelle Daniel Joseph
Harmon Marianne Elisabeth
Hung Joyce
Liu Hongwei
Moore David Roger
Fang Shane
General Electric Company
Gioeni Mary Louise
Gulakowski Randy
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