US PATENT SUBCLASS 558 / 127
.~.~.~ Forming a linkage wherein divalent chalcogen is bonded directly to two phosphori (e.g., forming the pyrophosphate linkage, etc.)

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}
70  DF  .~ Phosphorus esters (i.e., compounds having the phosphorus ester group, wherein trivalent or pentavalent phosphorus and carbon are bonded directly to the same divalent chalcogen, and wherein the carbon may be single bonded to any atom but may be multiple bonded only to carbon) {18}
87  DF  .~.~ Processes {19}
127.~.~.~ Forming a linkage wherein divalent chalcogen is bonded directly to two phosphori (e.g., forming the pyrophosphate linkage, etc.) {1}
128  DF  .~.~.~.~> Reactant having halogen attached directly to phosphorus by nonionic bonding

DEFINITION

Classification: 558/127

(under subclass 87) Processes which include joining a direct linkage between a divalent chalcogen (i.e., oxygen, sulfur,

selenium, or tellurium) and each of two phosphori.