Appeal No. 2000-0320 Page 8
Application No. 08/480,082
polydextrin; maltodextrin, dextran; polydextrose; gelatin,
collagen, natural gums, i.e., xanthan, locust bean, acacia,
tragacanth, carrageenan, and agar; derivatives of
polygalacturonic acid such as pectin; polyvinyl alcohol;
polyvinyl pyrrolidone; polyethylene glycol; and polyethylene
oxide.
The gel forming ionic polysaccharides found useful in
Viegas' invention are hydrophilic colloidal materials and
include the natural gums such as gellan gum, alginate gums,
i.e., the ammonium and alkali metal salts of alginic acid and
mixtures thereof. In addition, chitosan, which is the common
name for deacetylated chitin is useful. Generally, the
alginates can be any of the water-soluble alginates including
the alkali metal alginates, such as sodium, potassium,
lithium, rubidium and cesium salts of alginic acid, as well as
the ammonium salt, and the soluble alginates of an organic
base such as mono-, di-, or tri-ethanolamine alginates,
aniline alginates, and the like.
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