US PATENT SUBCLASS 549 / 548
.~.~.~.~ Having -C(=X)-, wherein X is chalcogen, bonded directly to 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}
512  DF  .~.~.~ The hetero ring is three-membered consisting of one oxygen and two carbons {7}
548.~.~.~.~ Having -C(=X)-, wherein X is chalcogen, bonded directly to the hetero ring {1}
549  DF  .~.~.~.~.~> The -C(=X)- is part of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens

DEFINITION

Classification: 549/548

(under subclass 512) Compounds in which a -- group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium), is bonded directly to the oxirane ring.

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