Appeal 2007-0501
Application 10/747,956
The appeal was heard on March 6, 2007.
We affirm the decision of the Primary Examiner.
Claims 8 through 12 illustrate Appellants’ invention of an alkali metal
fluorozincate in certain grain spectrum ranges:
8. A fine alkali metal fluorozincate produced by reacting alkali metal
hydroxide, zinc oxide, and alkali metal fluoride or hydrogen fluoride in
aqueous phase, wherein alkali metal hydroxide and zinc oxide are mixed into
a suspension and hydrogen fluoride is added, said fine alkali metal
fluorozincate having a grain spectrum in which 50% of all particles have a
diameter < 5 µm.
9. An alkali metal fluorozincate according to claim 8, wherein the
alkali metal is potassium.
10. A potassium fluorozincate according to claim 9, having a grain
spectrum in which 50% of all particles have a diameter < 3.8 µm.
11. A medium alkali metal fluorozincate produced by reacting alkali
metal hydroxide, zinc oxide, and alkali metal fluoride or hydrogen fluoride
in aqueous phase, wherein hydrogen fluoride and zinc oxide are mixed with
one another and alkali metal hydroxide is added, said medium alkali metal
fluorozincate having a grain spectrum in which 50% of all particles have a
diameter < 11 µm.
12. A coarse alkali metal fluorozincate produced by reacting alkali
metal hydroxide, zinc oxide, and alkali metal fluoride or hydrogen fluoride
in aqueous phase, wherein hydrogen fluoride and zinc oxide are mixed with
one another and alkali metal fluoride is added, said coarse alkali metal
fluorozincate having a grain spectrum in which 50% of all particles have a
diameter > 11 µm.
The Examiner relies on the evidence in these references:
Shimajiri US 4,989,775 Feb. 5, 1991
Popoola US 5,723,187 Mar. 3, 1998
Seseke-Koyro (Seseke-Koyro ‘641) WO 99/48641 A1 Sep. 30, 1999
Lauzon US 6,105,850 Aug. 22, 2000
Appellants request review of the following grounds of rejection under
35 U.S.C. § 103(a) (Br. 4-5), the grounds all advanced on appeal:
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