US PATENT SUBCLASS 556 / 26
.~.~.~.~ Nitrogen or -C(=X)- containing, wherein X is chalcogen

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {3}
1  DF  .~ HEAVY METAL CONTAINING (e.g., Ga, In or T1, etc.) {19}
13  DF  .~.~ Phosphorus containing {6}
24  DF  .~.~.~ Exactly four chalcogens bonded directly to the phosphorus (e.g., phosphates, orthophosphates, etc.) {2}
26.~.~.~.~ Nitrogen or -C(=X)- containing, wherein X is chalcogen

DEFINITION

Classification: 556/26

(under subclass 24) Compounds which contain nitrogen or a -C(=X)- group, wherein X is chalcogen.