US PATENT SUBCLASS 552 / 271
.~ 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.)

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.~ 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}
272  DF  .~.~> Phosphorus, selenium, tellurium, or heavy metal containing
273  DF  .~.~> The polycyclo ring system is bonded directly to an additional polycyclo ring system having at least three cyclo (e.g., plural anthracene configured ring systems bonded directly to each other, etc.)
274  DF  .~.~> The polycyclo ring system is attached indirectly by nonionic bonding to an additional polycyclo ring system having a least three cyclos (e.g., plural anthracene configured ring systems bonded directly to the same nitrogen, etc.)
275  DF  .~.~> The polycyclo ring system has at least ten cyclos
276  DF  .~.~> The polycyclo ring system has nine cyclos {3}
282  DF  .~.~> The polycyclo ring system has seven or eight cyclos {1}
284  DF  .~.~> The polycyclo ring system has five of six cyclos {1}
286  DF  .~.~> The polycyclo ring system has four cyclos (e.g., benzanthrones, etc.) {2}
289  DF  .~.~> Nitrogen or sulfur bonded directly to the anthracene configured ring system
290  DF  .~.~> Carbon, halogen or plural oxygens bonded directly to the anthracene configured ring system

DEFINITION

Classification: 552/271

(under subclass 1) Compounds under Class 532, ..., having a polycyclo ring system which is or contains the anthracene configured ring system has at least one double bond between ring members and has oxygen single bonded or any atom double bonded directly at the 9- or 10- position of the ring system.

(1) Note. For this and indented subclasses, the anthracene configured ring system is numbered as follows: [figure]

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