US PATENT SUBCLASS 203 / 69
.~.~.~ Aromatic

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}
68  DF  .~.~ Hydrocarbon {2}
69.~.~.~ Aromatic

DEFINITION

Classification: 203/69

(under subclass 68) Processes in which the hydrocarbon is aromatic.

(1) Note. A compound consisting of carbon and hydrogen characterized by the presence of a benzene nucleus is an aromatic hydrocarbon.

SEE OR SEARCH CLASS

585, Chemistry of Hydrocarbon Compounds,

16, and 18 for a hydrocarbon which contains a benzene nucleus.