US PATENT SUBCLASS 106 / 169.11
.~.~.~.~.~.~ The hetero ring is part of a polycyclo ring system (e.g., guanine, phthalimide, etc.)

Current as of: June, 1999
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106 /   HD   COMPOSITIONS: COATING OR PLASTIC

*  DD  COATING OR PLASTIC COMPOSITIONS {40}
162.1  DF  .~ Carbohydrate or derivative containing {15}
163.01  DF  .~.~ Cellulosic material {11}
168.01  DF  .~.~.~ Cellulose ester or salt thereof {21}
169.01  DF  .~.~.~.~ Cellulose nitrate {21}
169.1  DF  .~.~.~.~.~ With nitrogen hetero ring compound (e.g., succinimide, caprolactam, piperazine, etc.) {1}
169.11.~.~.~.~.~.~ The hetero ring is part of a polycyclo ring system (e.g., guanine, phthalimide, etc.)

DEFINITION

Classification: 106/169.11

The hetero ring is part of a polycyclo ring system (e.g., guanine, phthalimide, etc.):

(under subclass 169.1) Compositions wherein the nitrogen containing hetero ring compound has a ring system with at least two rings which (a) share with each other two adjacent ring atoms, or (b) share with each other three or more ring atoms.