US PATENT SUBCLASS 203 / 65
.~.~.~ Hydroxy aromatic (e.g., Phenol)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


203 /   HD   DISTILLATION: PROCESSES, SEPARATORY

50  DF  ADDING MATERIAL TO DISTILLAND EXCEPT WATER OR STEAM PER SE {2}
57  DF  .~ Organic compound {8}
63  DF  .~.~ Alcohol or ether {3}
65.~.~.~ Hydroxy aromatic (e.g., Phenol)

DEFINITION

Classification: 203/65

(under subclass 63) Processes in which the organic compound is a hydroxy aromatic, e.g., phenol, naphthol, cresol.