US PATENT SUBCLASS 552 / 523
.~.~ Sulfur bonded directly to the cyclopentanohydrophenanthrene ring system

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}
523.~.~ Sulfur bonded directly to the cyclopentanohydrophenanthrene ring system {2}
524  DF  .~.~.~> The sulfur is bonded directly at the 1- or 3-position
525  DF  .~.~.~> The sulfur is bonded directly at the 16- or 17-position

DEFINITION

Classification: 552/523

(under subclass 502) Compounds in which sulfur is bonded directly to the cyclopentanohydrophenanthrene ring system.