US PATENT SUBCLASS 552 / 277
.~.~.~ Cyano, nitrogen or sulfur bonded directly to the nonacyclo ring system

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}
277.~.~.~ Cyano, nitrogen or sulfur bonded directly to the nonacyclo ring system {1}
278  DF  .~.~.~.~> Halogen containing or processes wherein a halogen containing material is utilized

DEFINITION

Classification: 552/277

(under subclass 276) Compounds wherein the nonacyclo ring system has sulfur, nitrogen or cyano bonded directly thereto.

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