US PATENT SUBCLASS 521 / 98
.~.~.~ Ingredient contains only C and H atoms, only C and halogen atoms, or only C, H, and halogen atoms

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
82  DF  .~.~ Process of forming a cellular product subsequent to solid polymer formation in the presence of a stated ingredient, noncellular composition capable of forming a cellular product and containing a stated ingredient, or process of preparing same {14}
98.~.~.~ Ingredient contains only C and H atoms, only C and halogen atoms, or only C, H, and halogen atoms

DEFINITION

Classification: 521/98

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

(under subclass 82) 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.

(1) Note. This subclass includes the stated ingredient proper for this subclass in any physical state.