Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2005-03-01
2005-03-01
Acquah, Samuel A. (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
C528S176000, C528S300000, C528S301000, C528S302000, C528S307000, C528S308000, C528S308600, C526S064000, C526S065000, C526S067000, C526S071000, C524S081000
Reexamination Certificate
active
06861494
ABSTRACT:
The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior art processes including improved heat transfer, volume control, agitation and disengagement functions. The pipe reactor processes and apparatus of the present invention are built and operated at a much lower cost than conventional polyester processes.
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Acquah Samuel A.
Carmen Dennis V.
Eastman Chemical Company
Graves, Jr. Bernard J.
Owen Steven A.
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