US PATENT SUBCLASS 534 / 644
.~.~.~.~ Alkylene, alkenyl or alkenylene and a ring bonded directly to the same chalcogen or to plural chalcogens which are bonded directly to each other

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

*  DD  ORGANIC COMPOUNDS (CLASS 532, SUBCLASS 1) {8}
573  DF  .~ Azo {51}
617  DF  .~.~ Fiber- or substrate-reactive azo compound {5}
640  DF  .~.~.~ Alkylene, alkenyl, alkenylene, alkynyl or alkynylene attached directly or indirectlyto a ring by nonionic bonding {3}
644.~.~.~.~ Alkylene, alkenyl or alkenylene and a ring bonded directly to the same chalcogen or to plural chalcogens which are bonded directly to each other

DEFINITION

Classification: 534/644

(under subclass 640) Compounds in which an alkylene, alkenyl or alkenylene chain and a ring are both bonded directly to the same chalcogen atom (i.e., oxygen, sulfur, selenium or tellurium) or to plural chalcogens which are bonded directly to each other.

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