Appeal No. 1996-3493
Application No. 08/451,697
said zeolite being uniformly admixed to a ratio of from about 25 to about 75
weight % with one or more particulate binders selected from the group consisting of
kaolin, bentonite, alpha-alumina, and titania.
The references relied on by the examiner are:
Bergna et al. (Bergna) 4,683,334 Jul. 28, 1987
Abrams et al. (Abrams) 4,814,503 Mar. 21, 1989
Beck et al. (Beck) 5,250,484 Oct. 5, 1993
The references relied on by appellants in their brief (pages 7-8) are:1
Bemrose et al. (Bemrose), “A Review of Attrition and Attrition Test Methods,” 49 Powder
Technology 97-126 (1987).
Contractor et al. (Contractor), “Attrition Resistant Catalysts for Fluidized Bed Systems,” in
Engineering Foundation, New York, 589-596 (1989).
C. Satterfield, HETEROGENOUS CATALYSIS IN INDUSTRIAL PRACTICE 89-93 (2nd
edition, McGraw-Hill, New York 1991).
Claims 1-6 and 17 stand rejected under 35 U.S.C. § 103 as being unpatentable over Bergna in
view of Abrams or Beck. We REVERSE.
In reaching our decision in this appeal, we have given careful consideration to the appellants’
specification and claims and to the respective positions articulated by the appellants and the examiner.
We make reference to the examiner’s answer (Paper No. 9, mailed
1These three references were originally submitted as an attachment to the amendment filed October 4, 1995
(Paper No. 5) “to illustrate that it is possible for a catalyst composition to be attrition resistant but not crush
resistant, or vis versa” (page 7, lines 1-4).
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