The opinion in support of the decision being entered today was not written
for publication and is not binding precedent of the Board.
Paper No. 52
UNITED STATES PATENT AND TRADEMARK OFFICE
__________
BEFORE THE BOARD OF PATENT APPEALS
AND INTERFERENCES
__________
Ex parte SHOW-CHU WONG and SYLVIA KHOO
__________
Appeal No. 2002-1629
Application No. 08/863,121
__________
ON BRIEF
__________
Before WILLIAM F. SMITH, SCHEINER, and GRIMES, Administrative Patent
Judges.
GRIMES, Administrative Patent Judge.
DECISION ON APPEAL
This is a decision on appeal under 35 U.S.C. § 134 from the examiner’s
final rejection of claims 25-29, all of the claims remaining. Claim 25 is
representative and reads as follows:
25. A multi-purpose, cyanide-free lyse reagent for making hemoglobin
(Hb) and leukocyte (WBC) determinations comprising, in combination;
(a) an aqueous multipurpose lyse reagent comprising at least one
quaternary ammonium salt, said quaternary salt selected from the group
consisting of: tetradecyltrimethyl ammonium bromide (TTAB), dodecyltrimethyl
ammonium chloride, cetyl trimethyl ammonium bromide, hexadecyltrimethyl
ammonium bromide, benzalkonium chloride, cetylpyridium chloride, and
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