US PATENT SUBCLASS 558 / 273
.~.~.~ Nitrogen or additional chalcogen attached indirectly to the benzene ring by acyclic nonionic bonding

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
270  DF  .~.~ Benzene ring bonded directly to the -O-C(=O)O- group {4}
273.~.~.~ Nitrogen or additional chalcogen attached indirectly to the benzene ring by acyclic nonionic bonding

DEFINITION

Classification: 558/273

(under subclass 270) Compounds wherein the benzene ring is attached indirectly to nitrogen or to an additional chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) by acyclic nonionic bonding.

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