US PATENT CLASS 527
Class Notes


Current as of: June, 1999
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527 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES



DEFINITION

Classification: 527/

Subject to all applicable provisions and limitations of the Class 520 Class Definition, this class provides for solid synthetic resins derived from at least one saturated material and from

A. a reactant which is a cellular material derived from a plant or animal source (other than diatomaceous earth, blood, cotton, or farinaceous flour),

B. a reactant which is a protein or biologically active polypeptide,

C. a reactant which is a carbohydrate or derivation thereof,

D. a lignin, tannin, or derivative thereof,

E. a reactant which is coal or bituminous material, an extract or derivative thereof, or a fatty still residue,

F. a reactant which is a natural resin or derivative thereof (other than tall oil or a derivative thereof).