US PATENT SUBCLASS 552 / 260
.~.~.~.~ Acyclic carbonyl, sulfur or halogen containing


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}
208  DF  .~ Polycyclo ring system containing anthracene configured ring system having at least one double bond between ring members and having oxygen single bonded or any atom double bonded directly at the 9- and 10-positions (e.g., anthraquinones, etc.) {19}
238  DF  .~.~ Nitrogen bonded directly at alpha position (i.e., 1-, 4-, 5- or 8-position) {7}
255  DF  .~.~.~ Additional carbon bonded directly to the nitrogen {3}
260.~.~.~.~ Acyclic carbonyl, sulfur or halogen containing


DEFINITION

Classification: 552/260

(under subclass 255) Compounds which contain halogen, sulfur or acyclic carbonyl.

(1) Note. This subclass contains, for example: [figure] [figure] [figure]