US PATENT SUBCLASS 552 / 280
.~.~.~.~ Halogen or light metal containing or processes wherein a halogen or light metal containing is utilized

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

*  DD  ORGANIC COMPOUNDS (Class 532, subclass 1) {11}
271  DF  .~ Polycyclo ring system containing anthracene configured ring system having at least one double bond between ring members and having oxygen single bonded or any atom double bonded direct at the 9- or 10-position (e.g., anthrones, anthranois, etc.) {10}
276  DF  .~.~ The polycyclo ring system has nine cyclos {3}
279  DF  .~.~.~ Oxygen single bonded directly to the nonacyclo ring system {1}
280.~.~.~.~ Halogen or light metal containing or processes wherein a halogen or light metal containing is utilized

DEFINITION

Classification: 552/280

(under subclass 279) Compounds which contain halogen or light metal or processes under subclass 279 wherein a halogen or light metal material is utilized.

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