US PATENT SUBCLASS 508 / 401
.~.~.~.~ Prepared by addition of carbon dioxide, carbonic acid, or salt thereof

Current as of: June, 1999
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508 /   HD   SOLID ANTI-FRICTION DEVICES, MATERIALS THEREFOR, LUBRICANT OR SEPARATE COMPOSITIONS FOR MOVING SOLID SURFACES, AND MISCELLANEOUS MINERAL OIL COMPOSITIONS

110  DF  LUBRICANTS OR SEPARANTS FOR MOVING SOLID SURFACES AND MISCELLANEOUS MINERAL OIL COMPOSITIONS (E.G., WATER CONTAINING, ETC.) {53}
388  DF  .~ Organic sulfur compound, wherein the sulfur is single bonded directly to oxygen (e.g., sulfites, etc.) {2}
390  DF  .~.~ The sulfur is part of an -O-S(=O)(=O)- group (i.e., sulfonates) {12}
391  DF  .~.~.~ Overbased or carbonated sulfonates {7}
401.~.~.~.~ Prepared by addition of carbon dioxide, carbonic acid, or salt thereof {1}
402  DF  .~.~.~.~.~> Multiple additions thereof

DEFINITION

Classification: 508/401

Prepared by addition of carbon dioxide, carbonic acid, or salt thereof:

(under subclass 391) Compositions wherein the overbased or carbonated sulfonate is prepared by addition of carbon dioxide, carbonic acid, or a salt thereof to a reaction mixture containing a sulfonic acid or salt thereof, or by simultaneous addition of (1) carbon dioxide, carbonic acid, or a salt thereof and (2) sulfonic acid or salt thereof to a reaction mixture.

(1) Note. The reaction mixture may not contain alkylphenol, substituted alkylphenol, or a salt thereof. Such processes are provided for in subclass 392, supra.