US PATENT SUBCLASS 208 / 331
.~.~.~.~ Amino compound

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

Internet Version by PATENTEC © 1999      Terms of Use


208 /   HD   MINERAL OILS: PROCESSES AND PRODUCTS

308  DF  FRACTIONATION {5}
311  DF  .~ Liquid extraction with solvents {11}
322  DF  .~.~ Organic solvent containing {8}
330  DF  .~.~.~ Nitrogen-containing solvent {1}
331.~.~.~.~ Amino compound

DEFINITION

Classification: 208/331

(under subclass 330) Processes wherein the nitrogen containing organic compound includes an amine group.

(1) Note. This subclass contains for example, extraction processes using acyclic or carbocyclic amines, guanidines, oximes and quaternary ammonium compounds.