US PATENT SUBCLASS 558 / 265
.~.~ Plural -O-C(=O)O- groups attached indirectly to each other by nonionic bonding

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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.~.~ Plural -O-C(=O)O- groups attached indirectly to each other by nonionic bonding {2}
266  DF  .~.~.~> Additional chalcogen attached indirectly to one of the -O-C(=O)O- groups by acyclic nonionic bonding {1}
268  DF  .~.~.~> Benzene ring attached directly or indirectly to one of the -O-C(=O)O- groups by nonionic bonding {1}

DEFINITION

Classification: 558/265

(under subclass 260) Compounds which contain more than one -O-C(=O)O- group, which -O- C(=)O- groups are indirectly attached to each other by nonionic bonding.

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