US PATENT SUBCLASS 536 / 26.21
.~.~.~.~.~.~ Plural phosphorus atoms bonded directly to the same chalcogen in a chain (e.g., pyrophosphates, polyanhydrides of phosphorus acids, etc.)

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536 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1.11  DF  .~ Carbohydrates or derivatives {15}
18.7  DF  .~.~ Nitrogen containing {13}
22.1  DF  .~.~.~ N-glycosides, polymers thereof, metal derivatives (e.g., nucleic acids, oligonucleotides, etc.) {12}
26.1  DF  .~.~.~.~ Phosphorus containing N-glycoside wherein the N is part of an N-hetero ring {9}
26.2  DF  .~.~.~.~.~ Plural phosphorus atoms in N-glycoside {2}
26.21.~.~.~.~.~.~ Plural phosphorus atoms bonded directly to the same chalcogen in a chain (e.g., pyrophosphates, polyanhydrides of phosphorus acids, etc.) {2}
26.22  DF  .~.~.~.~.~.~.~> Both terminal phosphorus atoms are esterified by organic groups wherein one of these organic groups is the sugar moiety {1}
26.26  DF  .~.~.~.~.~.~.~> Triphosphates (in same chain)

DEFINITION

Classification: 536/26.21

Plural phosphorus atoms bonded directly to the same chalcogen in a chain (e.g., pyrophosphates, polyanhydrides of phosphorus acids, etc.):

(under subclass 26.2) Compounds which contain two phosphorus bonded directly to the same chalcogen (i.e., oxygen, sulfur selenium or tellurium) in a chain.

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