Synthetic Resins Or Natural Rubbers -- Part Of The Class 520 Series Patents (Class 527)
- FROM REACTANT WHICH IS A CELLULAR MATERIAL DERIVED FROM PLANT OR ANIMAL SOURCE AND IS OTHER THAN DIATOMACEOUS EARTH, BLOOD, COTTON, OR FARINACEOUS FLOUR, E.G., CITRUS PULP, WALNUT SHELL FLOUR, ETC. (Class 527/100)
- FROM PROTEIN OR BIOLOGICALLY ACTIVE POLYPEPTIDE REACTANT (Class 527/200)
- FROM CARBOHYDRATE OR DERIVATIVE AS A REACTANT (Class 527/300)
- FROM LIGNIN, TANNIN, OR DERIVATIVE REACTANT (Class 527/400)
- FROM COAL OR BITUMINOUS MATERIAL, EXTRACT OR DERIVATIVE THEREOF, OR FATTY STILL RESIDUE REACTANT (Class 527/500)
- FROM NATURAL RESIN OR DERIVATIVE REACTANT EXCLUDING TALL OIL OR DERIVATIVE (Class 527/600)
