US PATENT SUBCLASS 552 / 510
.~.~ The cyclopentanohydrophenanthrene ring system is part of a polycyclo ring system having at least five cyclos

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


552 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, subclass 1) {11}
502  DF  .~ Cyclopentanohydrophenanthrene ring system containing {21}
510.~.~ The cyclopentanohydrophenanthrene ring system is part of a polycyclo ring system having at least five cyclos {4}
511  DF  .~.~.~> The additional ring shares the 1,2-positions of the cyclopentanohydrophenanthrene ring system
512  DF  .~.~.~> The additional ring shares the 5,10- or 5,19-positions of the cyclopentanohydrophenanthrene ring system
513  DF  .~.~.~> The additional ring shares the 6,7-positions of the cyclopentanohydrophenanthrene ring system
514  DF  .~.~.~> The additional ring shares the 16,17-positions of the cyclopentanohydrophenanthrene ring system

DEFINITION

Classification: 552/510

(under subclass 502) Compounds in which the cyclopentanohydrophenanthrene ring system and at least one additional ring are parts of a polycyclo ring system having at least five cyclos.

(1) Note. An example of a compound provided for herein is: [figure]

SEE OR SEARCH THIS CLASS, SUBCLASS:

500+, for cyclogonanes, e.g., 3,5-cyclocholesterols, 3,5-cycloandrostanes, 5,9-cyclopregnanes, etc.