This Class is directed to (a) ion-exchange polymers and process for their preparation, (b) processes of treating scrap or waste product containing solid organic polymer to recover a solid polymer therefrom, and (c) cellular products (such as foams, pores, channels, etc.) and processes of preparing such products. See Subclass References to the Current Class, below.
LINES WITH OTHER CLASSES
The general line between this area and other areas of the Class 520 Series is that claims to preparing, treating, or to a porous or cellular product are considered as follows: (a) when a cellular containing product is inherently produced in a polymerization process (no control of process parameters so as to produce a cell containing product), then one must look to the specification to see if the use of the final cellular product is consistent with the use normally associated with a cellular product. If use is consistent with uses associated with a cellular product, classification is proper in this area; (b) when a cellular product is claimed which is the product of a noncellular-type polymerization process (e.g., bead, pearl, etc.) and wherein no later step is involved to introduce pores or any additional cell structure therein, then classification is as enumerated in (a) above.
SEE OR SEARCH THIS CLASS, SUBCLASS:
25, through 39, for ion-exchange polymers and process for their preparation.
40, through 49.8, for processes of treating scrap or waste product containing solid organic polymer to recover a solid polymer therefrom.
50, through 189, for cellular products (such as foams, pores, channels, etc.) and processes of preparing such products.