US PATENT SUBCLASS 210 / 735
.~.~.~.~ Nitrogen containing (e.g., amine, azo, etc.)

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

600  DF  PROCESSES {14}
702  DF  .~ Making an insoluble substance or accreting suspended constituents {14}
729  DF  .~.~ Utilizing organic precipitant {2}
732  DF  .~.~.~ Synthetic polymer {2}
735.~.~.~.~ Nitrogen containing (e.g., amine, azo, etc.) {1}
736  DF  .~.~.~.~.~> Derived from alkyl halide or epihalophydrin reactant

DEFINITION

Classification: 210/735

Nitrogen containing (e.g., amine, azo, etc.):

(under subclass 732) Process in which the polymer includes amino, azo, or N-cyclic units.

(1) Note. This subclass includes nonacrylic polymers containing nitrogen such as nylon.