US PATENT SUBCLASS 523 / 219
.~.~.~ Glass void

Current as of: June, 1999
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523 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
1  DF  .~ PROCESSES OF PREPARING A DESIRED OR INTENTIONAL COMPOSITION OF AT LEAST ONE NONREACTANT MATERIAL AND AT LEAST ONE SOLID POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT, OR PRODUCT THEREOF {71}
218  DF  .~.~ Process of forming a composition having a nonreactant material selected for its special void characteristic; or composition containing same, e.g., syntactic foam, etc. {1}
219.~.~.~ Glass void

DEFINITION

Classification: 523/219

Glass void:

(under subclass 218) Subject matter wherein the void containing material is glass.

(1) Note. See the Class 520 Glossary for the definition of the term "glass".

(2) Note. Included herein are hollow glass beads or glass balloons.