US PATENT SUBCLASS 564 / 328
.~.~.~.~ Benzophenones or benzothiophenones (i.e., the carbon is part of a carbonyl or thiocarbonyl)

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}
315  DF  .~.~.~ Two aryl rings or ring systems bonded directly to the same carbon {7}
328.~.~.~.~ Benzophenones or benzothiophenones (i.e., the carbon is part of a carbonyl or thiocarbonyl) {1}
329  DF  .~.~.~.~.~> Processes

DEFINITION

Classification: 564/328

(under subclass 315) Compounds which are benzophenones or benzothiophenones wherein the inter aryl carbon is part of a carbonyl or thiocarbonyl group.

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