US PATENT SUBCLASS 252 / 378 P
.~ Perlite


Current as of: June, 1999
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252 /   HD   COMPOSITIONS

378 R  DF  EXFOLIATED OR INTUMESCED {1}
378 P.~ Perlite

Unofficial Alpha Subclasses: R P

DEFINITION

Classification: 252/378

(under the class definition) Processes of exfoliating or

intumescing vermiculite, other micaceous substances, or other materials, or the products of such processes.

SEE OR SEARCH CLASS

99, Foods and Beverages: Apparatus,

323.4, for apparatus for puffing or intumescing cereal foods.

106, Compositions: Coating or Plastic, appropriate subclasses particularly

122, 601+ and 672+ for coating or plastic compositions containing expanded materials, and subclasses 417+ for micaceous pigments or fillers. 125, Stone Working,

23.01+, for processes of or apparatus for splitting mica or other materials.

241, Solid Material Comminution or Disintegration,

4, for processes of comminuting micaceous substances.

426, Food or Edible Material: Processes, Compositions, and Products, appropriate subclasses for puffing or intumescing food grain.

516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting, appropriate subclasses for subject matter relating to: colloid systems (such as sols*, emulsions, dispersions, foams, aerosols, smokes, gels, or pastes) or wetting agents (such as leveling, penetrating, or spreading); subcombination compositions of colloid systems containing at least an agent specialized and designed for or peculiar to use in making or stabilizing colloid systems; compositions and subcombination compositions specialized and designed for or peculiar to use in breaking (resolving) or inhibiting colloid systems; processes of making the compositions or systems of the class; processes of breaking (resolving) or inhibiting colloid systems; in each instance, when generically claimed or when there is no hierarchically superior provision in the USPC for the specifically claimed art; including those instances when a composition would otherwise be proper for this subclass (378).