US PATENT SUBCLASS 549 / 1
.~.~ Sulfur containing hetero ring (e.g., thiiranes, etc.)

Current as of: June, 1999
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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}
1.~.~ Sulfur containing hetero ring (e.g., thiiranes, etc.) {9}
2  DF  .~.~.~> With preservative or stabilizer
3  DF  .~.~.~> Heavy metal or aluminum containing
4  DF  .~.~.~> Boron or silicon containing
5  DF  .~.~.~> Phosphorus attached directly or indirectly to the hetero ring by nonionic bonding {1}
9  DF  .~.~.~> The hetero ring has at least seven members {2}
13  DF  .~.~.~> The hetero ring is six-membered {3}
29  DF  .~.~.~> The hetero ring is five-membered {13}
88  DF  .~.~.~> The hetero ring is four-membered {1}
90  DF  .~.~.~> The hetero ring is three-membered and has chalcogen or nitrogen attached directly or indirectly thereto by nonionic bonding

DEFINITION

Classification: 549/1

(under subclass 1) Compounds under Class 540, ... which contain a hetero ring having sulfur as a ring hetero atom.

(1) Note. Inner sulfonium salts, even when represented in cyclic form, are classified under Class 568, subclasses 18+.