Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2011-08-30
2011-08-30
Truong, Duc (Department: 1765)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S328600, C525S328800, C525S535000, C528S391000, C528S373000, C521S025000, C521S027000, C429S080000
Reexamination Certificate
active
08008406
ABSTRACT:
A fuel cell membrane is described comprising at least one sulfonated aromatic polyether copolymer comprising a poly-arylen-ether-ketone (PEK) moiety or sulfonated derivatives thereof, deriving from spiro-bis-indane or 4,4′-(hexafluoroisopropylidene)diphenol (BPAF), and an arylene-sulfone, or an arylene-ketone or sulfonated derivative thereof; said copolymer having the following formula (1):wherein Ar1has formula,wherein X is spiro-bis-indanile (SBI) (b) or BPAF (c) having formulas:and wherein Y is H or SO3H, andAr2has formulawherein W is CO or SO2, and Y is H or SO3H, wherein Z is OH or Cl; and wherein at least one between Ar1or Ar2comprise at least one sulfonic group; and wherein n is an integer comprised between 2 and 50. A method for the production of such membrane is also described.
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Hibino et al; Solid electrolyte and fuel cell; 2005, Fujitsu Limited, Japan; Chem Abstract 143: 269603.
Calamia Stefania
Consiglio Giuseppe
Leo Chiara Silvana
Salanitri Marco Antonio
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Jorgenson Lisa K.
STMicroelectronics S.r.l.
Truong Duc
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