US PATENT SUBCLASS 521 / 132
.~.~.~.~ Said ingredient is substantially nonvolatile material, e.g., hydrocarbon waxes, greases, etc.

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {3}
50  DF  .~ CELLULAR PRODUCTS OR PROCESSES OF PREPARING A CELLULAR PRODUCT, E.G., FOAMS, PORES, CHANNELS, ETC. {27}
99  DF  .~.~ Cellular product formation prior to or during solid polymer formation in the presence of a stated ingredient other than water {18}
131  DF  .~.~.~ Ingredient contains only carbon and hydrogen atoms, only C and halogen atoms, or only C, H, and halogen atoms {1}
132.~.~.~.~ Said ingredient is substantially nonvolatile material, e.g., hydrocarbon waxes, greases, etc.

DEFINITION

Classification: 521/132

Said ingredient is substantially nonvolatile material, e.g., hydrocarbon waxes, greases, etc.:

(under subclass 131) Subject matter wherein the stated ingredient which contains (1) only carbon and halogen atoms, or (2) only carbon, hydrogen, and halogen atoms, or (3) only carbon and halogen atoms, is a solid or liquid and has slight or no tendency to pass into a gaseous state under the contemplated conditions of the process.

(1) Note. Materials proper for this subclass are often described as plasticizers, flame retardants, lubricants, waxes, greases, oils, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

131, for a material chemically proper for this subclass, but which is described as a blowing agent. Where any doubt occurs as to whether appreciable volatization occurs under the contemplated process conditions, such doubt should be resolved by placing the document into subclass 131.