(under the class definition) Subject matter including (a) a process involving the use of rubber or a reaction product thereof or (b) an abrading material or composition including rubber or a reaction product thereof.
SEE OR SEARCH CLASS
15, Brushing, Scrubbing, and General Cleaning,
424+, for an erasing implement having an erasive body of rubber, unmixed with crystalline particles which have sharp cutting edges; and see (1) Note in that subclass for the distinction between the erasers in Class 15 and those in Classes 51 and 451.
520, Synthetic Resins or Natural Rubbers,
1+, for a rubber or rubber composition in general.
