US PATENT SUBCLASS 521 / 131
.~.~.~ Ingredient contains only carbon and hydrogen atoms, only C and halogen atoms, or only C, H, and halogen atoms

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.~.~.~ Ingredient contains only carbon and hydrogen atoms, only C and halogen atoms, or only C, H, and halogen atoms {1}
132  DF  .~.~.~.~> Said ingredient is substantially nonvolatile material, e.g., hydrocarbon waxes, greases, etc.

DEFINITION

Classification: 521/131

Ingredient contains only carbon and hydrogen atoms, only C and halogen atoms, or only C, H, and halogen atoms:

(under subclass 99) Subject matter wherein the stated ingredient contains (1) only carbon and hydrogen atoms, or (2) only carbon, hydrogen, and halogen atoms, or (3) only carbon and halogen atoms.