US PATENT SUBCLASS 524 / 121
.~.~.~.~.~.~ Two or more phosphorus atoms directly or indirectly bonded together by only covalent bonds

Current as of: June, 1999
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524 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
*  DD  .~ PROCESSES OF PREPARING A DESIRED OR INTENTIONAL COMPOSITION OF AT LEAST ONE NONREACTANT MATERIAL AND AT LEAST ONE SOLID POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT, OR PRODUCT THEREOF (Class 523, subclass 1) {17}
1  DF  .~.~ Adding a NRM to a preformed solid polymer or preformed specified intermediate condensation product, composition thereof; or process of treating or composition thereof {31}
80  DF  .~.~.~ DNRM which is other than silicon dioxide, glass, titanium dioxide, water, halohydrocarbon, hydrocarbon, or elemental carbon {4}
81  DF  .~.~.~.~ Organic DNRM {21}
115  DF  .~.~.~.~.~ Phosphorus organic compound DNRM {8}
121.~.~.~.~.~.~ Two or more phosphorus atoms directly or indirectly bonded together by only covalent bonds {6}
122  DF  .~.~.~.~.~.~.~> Phosphorus double bonded to an atom other than C or O
123  DF  .~.~.~.~.~.~.~> Phosphorus bonded directly to three chalcogen atoms and having only one P-C linkage, e.g., phosphonate, etc. {2}
126  DF  .~.~.~.~.~.~.~> Phosphorus bonded directly to only two chalcogen atoms and having at least one P-C linkage, e.g., phosphinate, phosphonite, etc.
127  DF  .~.~.~.~.~.~.~> Phosphorus bonded directly to four chalcogen atoms, e.g., phosphate, etc.
128  DF  .~.~.~.~.~.~.~> Phosphorus bonded directly to three chalcogen atoms only, e.g., phosphite, etc.
129  DF  .~.~.~.~.~.~.~> Phosphorus directly bonded to at least one chalcogen and only H or C, e.g., phosphine oxide, etc.

DEFINITION

Classification: 524/121

Two or more phosphorus atoms directly or indirectly bonded together by only covalent bonds:

(under subclass 115) Subject matter wherein the phosphorus compound contains two or more phosphorus atoms bonded directly or through other atoms to each other by only covalent bonds, e.g., as illustrated below, etc. [figure]