US PATENT SUBCLASS 556 / 17
.~.~.~ Plural phosphori bonded directly to the same nitrogen or chalcogen (e.g., pyrophosphates, etc.)

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}
17.~.~.~ Plural phosphori bonded directly to the same nitrogen or chalcogen (e.g., pyrophosphates, etc.)

DEFINITION

Classification: 556/17

(under subclass 13) Compounds wherein at least two phosphori are bonded directly to the same nitrogen or chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).

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