US PATENT SUBCLASS 264 / 4.1
.~ Liquid encapsulation utilizing an emulsion or dispersion to form a solid-walled microcapsule (includes liposome)

Current as of: June, 1999
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264 /   HD   PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES

4  DF  ENCAPSULATING NORMALLY LIQUID MATERIAL {1}
4.1.~ Liquid encapsulation utilizing an emulsion or dispersion to form a solid-walled microcapsule (includes liposome) {4}
4.3  DF  .~.~> With treatment subsequent to solid wall formation (e.g., coating, hardening, etc.) {2}
4.4  DF  .~.~> Solid-walled microcapsule formed by cooling molten materials
4.6  DF  .~.~> Solid-walled microcapsule formed by physically removing a constituent (e.g., evaporation, extraction, etc.)
4.7  DF  .~.~> Solid-walled microcapsule formed by in situ polymerization

DEFINITION

Classification: 264/4.1

Liquid encapsulation utilizing an emulsion or dispersion to form a solid-walled microcapsule (includes liposome):

(under subclass 4) Subject matter wherein a medium in the form of an emulsion or dispersion is used to affect encapsulation of the liquid. The medium may contain one or more polymers, polymer precursors, monomers or other encapsulating materials, e.g., gelatin, wax, etc.

(1) Note. Liposomes are formed of mesomorphic walls (i.e., a state of matter intermediate between crystalline solid and normal isotropic liquid) and are classified here based on their solid characteristics.