Description: 524 synthetic resins or natural rubbers -- part of the class 520 series / 524 synthetic resins or natural rubbers -- part of the class 520 series/() synthetic resins (class 520, subclass 1) () processes of preparing a desired or intentional composition of at least one nonreactant material and at least one solid polymer or specified intermediate condensation product, or product thereof (class 523, subclass 1) (1) adding a nrm to a preformed solid polymer or preformed specified intermediate condensation product, composition thereof; or process of treating or composition thereof (59) coal, bituminous additive, extract, or derivative thereof; or oil shale; or fatty still residue dnrm (65) coal derived additive, e.g., lignite, etc.
Hierarchy/Derived subclasses
uspto searches
Patent Apps in 524/65
Granted Patents in 524/65
Use the links above or do an advanced search in
ppubs for:
(524/65.ccls. or 524/66.ccls.)
This will show what classes derive from the input. Ex: entering 43/42.24 shows the derived classes and the search that can be used to find
patents or patent applications in those subclasses.