US PATENT SUBCLASS 44 / 373
.~.~ Overbased sulfonate or carbonated alkaline earth metal sulfonate

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}
370  DF  .~ Containing organic -S(=O)(=O)O- compound (i.e., sulfonates) {4}
373.~.~ Overbased sulfonate or carbonated alkaline earth metal sulfonate

DEFINITION

Classification: 44/373

Overbased sulfonate or carbonated alkaline earth metal sulfonate:

(under subclass 370) Compositions which contain sulfonate compounds which are overbased or are carbonated.

(1) Note. An overbased sulfonate is one in which an amount of alkaline metal (i.e., Mg, Ca, Ba, Sr) is present which is greater than the stoichiometric amount of metal which would be present if the parent sulfonic acid, R-S(=O) (=O)OH, were fully neutralized. The exact structure of this type compound has not been determined.

(2) Note. A carbonated alkaline earth metal sulfonate is the complex resulting from the reaction of carbon dioxide with alkaline earth metal sulfonate.