SYNTHETIC RESINS (CLASS 520, SUBCLASS 1)
Subclass of:
521 - Synthetic resins or natural rubbers -- part of the class 520 series
Patent class list (only not empty are listed)
Deeper subclasses:
Class / Patent application number | Description | Number of patent applications / Date published |
---|---|---|
521050000 | CELLULAR PRODUCTS OR PROCESSES OF PREPARING A CELLULAR PRODUCT, E.G., FOAMS, PORES, CHANNELS, ETC. | 2241 |
521025000 | ION-EXCHANGE POLYMER OR PROCESS OF PREPARING | 303 |
521040000 | PROCESS OF TREATING SCRAP OR WASTE PRODUCT CONTAINING SOLID ORGANIC POLYMER TO RECOVER A SOLID POLYMER THEREFROM | 175 |