US PATENT SUBCLASS 564 / 311
.~.~.~.~ Symmetrical diaryl hydrazines

Current as of: June, 1999
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564 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ AMINO NITROGEN CONTAINING (E.G., UREA, SULFONAMIDES, NITROSAMINES, OXYAMINES, ETC., AND SALTS THEREOF) {37}
305  DF  .~.~ Benzene ring containing {24}
310  DF  .~.~.~ Hydrazines {3}
311.~.~.~.~ Symmetrical diaryl hydrazines {1}
312  DF  .~.~.~.~.~> Preparing directly by reducing nitrogen containing group with metal and metallic hydroxide

DEFINITION

Classification: 564/311

(under subclass 310) Compounds wherein each nitrogen of the hydrazine radical is bonded directly to a benzene ring.

(1) Note. This subclass contains, for example: [figure] [figure]