US PATENT SUBCLASS 548 / 114
.~.~.~.~.~ The polycyclo ring system and phosphorus are both bonded directly to the same chalcogen

Current as of: June, 1999
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548 /   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) {4}
100  DF  .~.~ Hetero ring is five-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazoles, etc.) {18}
112  DF  .~.~.~ Phosphorus attached indirectly to the five-membered hetero ring by nonionic bonding {4}
113  DF  .~.~.~.~ Polycyclo ring system having the five-membered hetero ring as one of the cyclos {1}
114.~.~.~.~.~ The polycyclo ring system and phosphorus are both bonded directly to the same chalcogen

DEFINITION

Classification: 548/114

(under subclass 113) Compounds wherein the polycyclo ring system and phosphorus are both bonded directly to the same chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) atom.

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