The opinion in support of the decision being entered
today was not written for publication and is not binding
precedent of the Board.
UNITED STATES PATENT AND TRADEMARK OFFICE
_______________
BEFORE THE BOARD OF PATENT APPEALS
AND INTERFERENCES
_______________
Ex parte JEROEN FRANS JOCHEM BRONS
and MICHIEL BAREND ELEVELD
______________
Appeal No. 2005-1140
Application 10/247,069
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ON BRIEF
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Before WARREN, KRATZ and JEFFREY T. SMITH, Administrative Patent Judges.
WARREN, Administrative Patent Judge.
Decision on Appeal
This is an appeal under 35 U.S.C. § 134 from the decision of the examiner refusing to
allow claims 1 through 7 as amended subsequent to the final rejection, which are all of the
claims in the application..
Claim 1 illustrates appellants’ invention of a process for preparing polyoxyalkylene
polyether products employing a mixing reactor and a pipe reactor in sequence, and is
representative of the claims on appeal:
1. A process for preparing polyoxyalkylene polyether products, which process comprises
(i) reacting starter and alkylene oxide in the presence of a double metal cyanide complex catalyst
while mixing, and (ii) reacting in a pipe reactor the mixture obtained in step (i) to obtain a
polyoxyalkylene polyether product comprising substantially no alkylene oxide, and
(iii) removing the product of step (ii) from the process, wherein no additional amount of starter,
alkylene oxide and/or the double metal cyanide complex catalyst is added to the pipe reactor.
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