US PATENT SUBCLASS 521 / 62
.~.~.~ Mixture of solid polymers present during cell formation

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}
61  DF  .~.~ Process of preparing a cellular product by removal of material from a solid polymer-containing matrix without expanding the matrix; composition which is nonexpandible and is designed to form a cellular product by said process; or process of preparing said composition {3}
62.~.~.~ Mixture of solid polymers present during cell formation

DEFINITION

Classification: 521/62

Mixture of solid polymers present during cell formation:

(under subclass 61) Subject matter wherein two or more polymers are present during the cell-forming operation.

(1) Note. This subclass includes "block" or "graft" copolymers.

(2) Note. One of the polymers may be formed "in situ".

(3) Note. One of the polymers may be partially or completely removed during the cell-forming operation.