US PATENT SUBCLASS 552 / 634
.~.~.~.~ Carbon or halogen bonded directly at the 1- or 3-position

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}
623  DF  .~.~ Two oxygens bonded directly to the cyclopentanohydrophenanthrene ring system {5}
633  DF  .~.~.~ Carbon bonded directly at the 10- and 13-positions (e.g., androstenes, etc.) {5}
634.~.~.~.~ Carbon or halogen bonded directly at the 1- or 3-position

DEFINITION

Classification: 552/634

(under subclass 633) Compounds wherein carbon or halogen is bonded directly at the 1- or 3-position of the cyclopentanohydrophenanthrene ring system.