US PATENT SUBCLASS 44 / 398
.~.~.~.~ Mono- di-, or polyester of polycarboxylic acids

Current as of: June, 1999
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44 /   HD   FUEL AND RELATED COMPOSITIONS

300  DF  LIQUID FUELS (EXCLUDING FUELS THAT ARE EXCLUSIVELY MIXTURES OF LIQUID HYDROCARBONS) {31}
385  DF  .~ Containing organic -C(=O)O- compound (e.g., fatty acids, etc.) {8}
388  DF  .~.~ The single bonded oxygen is bonded directly to an additional carbon, which carbon may be single bonded to any element but may be multiple bonded only to carbon (i.e., carboxylic acid esters) {4}
389  DF  .~.~.~ Plural -C(=O)O- groups attached to each other directly or indirectly by nonionic bonding (e.g., polyesters, half ester-half acid compounds, etc.) {5}
398.~.~.~.~ Mono- di-, or polyester of polycarboxylic acids

DEFINITION

Classification: 44/398

Mono-, di-, or polyester of polycarboxylic acids:

(under subclass 389) Compositions which contain a polycarboxylic acid which is mono-, di-, or polyesterified.

(1) Note. By polycarboxylic acid is meant a compound in which the carbons of plural -C(=O)O- groups are attached to each directly or through an acyclic or cyclic chain of atoms.