Appeal No. 2004-2028
Application No. 09/423,746
except for a caking inhibitor “comprising lignite coke and/or a
magnesium compound selected from the group consisting of magnesium
oxide, magnesium hydroxide, mixtures of magnesium oxides and
magnesium hydroxide and magnesium hydroxycarbonate,...wherein said
inhibitor is present in amount by weight of greater than 0.5% of
the weight of sodium bicarbonate.”
To remedy these deficiencies, the examiner relies on the
disclosure of Regler. We find that Regler teaches a fine powder
mixture useful for removing acidic components, such as hydrogen
chloride and sulfur dioxide, in waste gases resulting from the
burning of wastes. See pages 1 and 4. We find that Regler teaches
forming the powder mixture by adding a basic alkaline earth
compound, such as magnesium oxide and/or magnesium hydroxide, as
well as a surface active substance, such as brown coal-health
furnace coke (lignite coke), to sodium hydrogen carbonate (sodium
bicarbonate). See page 4. The fraction of the surface active
substance in the mixture is preferably 1 to 10 wt%. See page 5.
The fraction of the basic alkaline earth compound, such as
magnesium oxide and/or magnesium hydroxide employed is greater than
0.5 wt%. See page 4, together with page 7. According to Regler
(page 4), the use of such mixture provides “substantial advantage”
in the removal of the acid components from the waste gases.
Given the advantage of adding the claimed amount of magnesium
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