Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...
Reexamination Certificate
2007-07-31
2011-10-18
Nutter, Nathan M (Department: 1765)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Treating polymer containing material or treating a solid...
C528S503000, C264S176100, C264S219000
Reexamination Certificate
active
08039581
ABSTRACT:
A process for crystallizing a polyester polymer by introducing a molten polyester polymer, such as a polyethylene terephthalate polymer, into a liquid medium at a liquid medium temperature greater than the Tgof the polyester polymer, such as at a temperature ranging from 100° C. to 190° C., and allowing the molten polyester polymer to reside in the liquid medium for a time sufficient to crystallize the polymer under a pressure equal to or greater than the vapor pressure of the liquid medium. A process flow, underwater cutting process, crystallization in a pipe, and a separator are also described.
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Ekart Michael Paul
Jernigan Mary Therese
Wells Cory Lee
Windes Larry Cates
Grupo Petrotemex, S.A. de C.V.
Nutter Nathan M
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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