Appeal No. 1996-3674
Application No. 08/451,826
consisting of kaolin, bentonite, alpha-alumina, and titania, at a ratio of from about 25 to
about 75 weight %;
(b) adding the blend to water to yield a slurry of about 10 to about 55 weight
percent solids;
(c) spray drying the slurry to form microspherical particles comprising a
composite of zeolite and binder; and
(d) calcining the particles at a temperature of about 500 to 750E C.
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 CONDENSED CHEMICAL DICTIONARY 777 (10th ed., Van Nostrand Reinhold
Company, New York 1981).
The references relied on by appellants in their brief (page 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 7, 8, 11 and 14 stand rejected under 35 U.S.C. § 103 as being unpatentable over
Bergna in view of Abrams or Beck. Claims 9 and 10 stand rejected under 35 U.S.C. § 103 as being
1These three references were originally submitted as an attachment to the amendment filed October 10, 1995
(Paper No. 7) “to illustrate that it is possible for a catalyst composition to be attrition resistant but not crush
resistant, or vis versa” (page 8, first full paragraph).
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