Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2006-03-30
2009-12-29
Choi, Ling-Siu (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
C528S300000, C528S302000, C264S176100, C264S171200, C264S171150, C264S171240
Reexamination Certificate
active
07638591
ABSTRACT:
Polyetherester elastomers comprising about 25 to about 59 weight percent poly(trimethylene ether) ester soft segments and about 41 to about 75 weight percent hard segments, wherein the poly(trimethylene ether) ester soft segments are derived from poly(trimethylene ether) glycol having a number average molecular weight of about 600 to about 2500. Compositions thereof and articles made therefrom are disclosed.
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de Brant Smith Edward Maxwell
McKenna James Michael
Wrigley David J.
Choi Ling-Siu
E. I. du Pont de Nemours and Company
Jarnholm Arne
Smith Loretta
Tischler Frances
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