The opinion in support of the decision being entered
today was not written for publication in a law journal
and is not binding precedent of the Board.
Paper No. 16
UNITED STATES PATENT AND TRADEMARK OFFICE
BEFORE THE BOARD OF PATENT APPEALS
AND INTERFERENCES
Ex parte HAN YUAN-ZHANG
Appeal No. 2004-0638
Application No. 10/038,975
ON BRIEF
Before KIMLIN, WARREN and DELMENDO, Administrative Patent Judges.
KIMLIN, Administrative Patent Judge.
DECISION ON APPEAL
This is an appeal from the final rejection of claims 1, 3
and 4, all the claims remaining in the present application.
Claim 1 is illustrative:
1. In a process for preparing 1,3-propanediol by reacting
ethylene oxide feed with carbon monoxide and hydrogen at
hydroformylation conditions to form 3-hydroxypropanal, and
hydrogenating said 3-hydroxypropanial to 1,3-propanediol, the
improvement wherein the said feed ethylene oxide contains by
weight more than 50 ppm aldehydes expressed as acetaldehyde.
-1-
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