Composition and method of making an element-modified ferrofluid

Compositions – Magnetic – Flaw detection or magnetic clutch

Reexamination Certificate

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C252S062550

Reexamination Certificate

active

07063802

ABSTRACT:
An element-modified ferrofluid comprising a base oil, a plurality of magnetic particles covered with at least one surfactant, and an elemental modifier. The elemental modifier is a metal, a metal mixture, an alloy, or a nonmetal.

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