US PATENT SUBCLASS 428 / 402
.~ Particulate matter (e.g., sphere, flake, etc.)

Current as of: June, 1999
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428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

357  DF  COATED OR STRUCTUALLY DEFINED FLAKE, PARTICLE, CELL, STRAND, STRAND PORTION, ROD, FILAMENT, MACROSCOPIC FIBER OR MASS THEREOF {5}
402.~ Particulate matter (e.g., sphere, flake, etc.) {3}
402.2  DF  .~.~> Microcapsule with fluid core (includes liposome) {1}
402.24  DF  .~.~> Microcapsule with solid core (includes liposome)
403  DF  .~.~> Coated {2}

DEFINITION

Classification: 428/402

(under subclass 357) Product comprising structurally defined or coated small grains or bits of matter.

(1) Note. A patent reciting a coated or encapsulated material with claimed utility (ies) or solely disclosed utility is classified with the composition classes. A similar patent with (a) multiply disclosed utilities or (b) undisclosed utility is classified in this Class 428, subclasses 402.2+. However, in the latter two cases (a) and (b) above, when the coating or encapsulating material stabilizes a compound against physical or chemical degradation, classification is appropriate for and subject to the limitations set forth in one of the compound (element) classes. The order of superiority of the composition classes are listed below under SEARCH CLASS. Those classes with an asterisk after the description are not composition classes but deemed appropriate for further search.

(2) Note. The recitation of any term, e.g., encapsulation, microencapsulation, sphere, microsphere, capsule, microcapsule, etc. which describes or gives evidence for a microencapsulated product is adequate for placement herein. Lacking such description or evidence the particle will be considered a "coated" particle and therefore appropriate in this class, subclass 403. For example, a patent reciting the encapsulated product of eugenol with dextrinized corn starch is sufficient for placement in this subclass. However, a "clathrate" of the some product would be classified in Class 536, subclass 103. (See (3) Note, below on clathrates and intercalates).

(3) Note. Clathrates and intercalates (inclusion compounds), per se, are classified hierarchically and subject to the limitations set forth in the compound (element) classes based both on the encapsulant and encapsulate. See the section, LINES WITH OTHER CLASSES, subsection D. CLATHRATES AND INTERCALATES, for examples.

SEE OR SEARCH CLASS

504, Plant Protecting and Regulating Compositions. (See

100, for seeds coated with agricultural chemicals other than fertilizers.) 424, Drug, Bio-Affecting and Body Treating Composition,

16+, for coated, impregnated or layered feature.

426, Food or Edible Material: Processes, Compositions, and Products,

89+,.

71, Chemistry: Fertilizers (See

64.11, for slow release forms.)

149, Explosive and Thermic Compositions or Charges,

3+, for a coated component.

430, Radiation Imagery Chemistry: Process, Composition, or Product Thereof,

138, for a microcapsule.

252, Compositions, 9+,.

44, Fuel and Related Compositions; see, for example,

6, coated or impregnated material.

148, Metal Treatment,

22+, for composition and 31.5 for a coated stock-material.

252, Compositions (special uses or functions) to

194,.

502, Catalys, Solid Sorbent, or Support Therefor: Product or Process of Making,

60+, and 527.11-527.24.

252, Compositions (special uses or functions),

478, and those following, except subclasses 302+, 363.5, 372+, and 378.

8, Bleaching and Dyeing; Fluid Treatment and Chemical Modification or Textiles and Fibers, 526, for a dye in specified form other than mere powder.

429, Chemistry: Electrical Current Producing Apparatus, Product, and Process.

204, Chemistry: Electrical and Wave Energy.

106, Compositions: Coating or Plastic for a filler or pigment for a coating composition which may include size or structure of the constituent particles or fibers which

recitation does not serve to exclude from Class 106. See especially

31.14, (invisible inks), 36, 84, 97+, 103, 108, 117, 235, 241, 251, 253+, 266, 272, 275, 276, 280, 281+, 288+, and 308 (coated material) in Class 106. See also Relation to Material or Composition Classes, above in definition.

501, Compositions: Ceramic

51, Abrasive Tool Making Process, Material, or Composition; e.g.,

295, for impregnating or coating an abrasive tool.

75, Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures, (Alloys).

420, Alloys or Metallic Compositions.

75, Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures, (rest of class). 520, Synthetic Resins or Natural Rubbers; see, for example, Class 523,

161, invisible ink composition and 200+ for a composition containing product in the form of surface-coated, impregnated, encapsulated or surface-modified materials.

260, Chemistry of Carbon Compounds,

709+,.

208, Mineral Oils: Processes and Products.

252, Composition (nonspecial uses or functions i.e.,

302+, 363.5, 372+, and 378).

585, Chemistry of Hydrocarbon Compounds (mixture subclasses).

118, Coating Apparatus,

303, for apparatus for spray coating particulate material.*

264, Plastic and Nonmetallic Article Shaping or Treating: Processes,

4+, for processes or encapsulating liquid core materials.* 427, Coating Processes,

213.3+, for processes of encapsulation solid core

materials.*