US PATENT SUBCLASS 514 / 177
.~.~ Oxygen double bonded to a ring carbon of the cyclopentanohydrophenanthrene ring system

Current as of: June, 1999
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514 /   HD   DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS

1  DF  DESIGNATED ORGANIC ACTIVE INGREDIENT CONTAINING (DOAI) {29}
169  DF  .~ Cyclopentanohydrophenanthrene ring system DOAI {5}
177.~.~ Oxygen double bonded to a ring carbon of the cyclopentanohydrophenanthrene ring system {1}
178  DF  .~.~.~> Oxygen single bonded to a ring carbon of the cyclopentanohydrophenanthrene ring system {2}

DEFINITION

Classification: 514/177

Oxygen double bonded to a ring carbon or the cyclopentanohydrophenanthrene ring system:

(under subclass 169) Subject matter wherein a nuclear carbon of the cyclopentanohydrophenanthrene nucleus is bonded to an oxygen atom through a double bond (C=O).