US PATENT SUBCLASS 508 / 418
.~.~.~ Aluminum or heavy metal sulfonate salt

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}
418.~.~.~ Aluminum or heavy metal sulfonate salt

DEFINITION

Classification: 508/418

Aluminum or heavy metal sulfonate salt:

(under subclass 390) Compositions which contain a heavy metal or an aluminum salt of a sulfonic acid.

(1) Note. Arsenic is considered a heavy metal.

(2) Note. Heavy metals are those whose specific gravity is greater than 4.0.