US PATENT SUBCLASS 558 / 266
.~.~.~ Additional chalcogen attached indirectly to one of the -O-C(=O)O- groups by acyclic nonionic bonding

Current as of: June, 1999
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558 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {21}
260  DF  .~ Carbonate esters (i.e, compounds having the -O-C(=O)O- group bonded directly to at least one carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon) {8}
265  DF  .~.~ Plural -O-C(=O)O- groups attached indirectly to each other by nonionic bonding {2}
266.~.~.~ Additional chalcogen attached indirectly to one of the -O-C(=O)O- groups by acyclic nonionic bonding {1}
267  DF  .~.~.~.~> The additional chalcogen, X, is in a -C(=X)- group

DEFINITION

Classification: 558/266

(under subclass 265) Compounds wherein an additional chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached indirectly to one of the -O-C(=O)O- groups by acyclic nonionic bonding.

(1) Note. Examples of compounds provided for herein are [figure] [figure]