US PATENT SUBCLASS 549 / 507
.~.~.~.~ One double bond between ring members of the hetero ring

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

Internet Version by PATENTEC © 1999      Terms of Use


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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
*  DD  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM, OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS (Class 540, subclass 1) {2}
200  DF  .~.~ Oxygen containing hetero ring (e.g., dioxirane, etc.) {16}
429  DF  .~.~.~ The hetero ring is five-membered {14}
507.~.~.~.~ One double bond between ring members of the hetero ring

DEFINITION

Classification: 549/507

(under subclass 429) Compounds wherein exactly one double bond is present between ring members of the hetero ring.

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