The Lubrizol Corporation

David B Skursha

James D Burrington

Frederick P Boyle

Jack C Kelley

Vadim F Lvovich

Frank M Van Lier

David A McCaughey

Lewis A Williams

The present invention relates to a controlled release gel with an ashless component and defined ash-producing component. Further, the invention relates to the use of a controlled release gel with a controlled level of ash-producing (i.e., metal) components for delivery of additives into lubricants wherein the gel has reduced ash and SAPS producing components.

Low ash controlled release gels

A method for determining quality and condition of a highly resistive fluid in transportation and industrial equipment. The method uses apparatus that applies a multitude of oscillating voltage signals at determined frequencies and offsets to electrodes immersed in the fluid and quantifies fluid response to the signals. The method monitors response of the fluid to a preferred three fixed electrical signals applied by the apparatus, a high and a medium frequency signal with zero offset voltage and a low frequency signal with an offset voltage. For apparatus or applications where the monitored fluid is not controlled to constant temperature, the method includes correcting the temperature sensitive fluid responses for temperature variations for the fluid quality and condition determination. The method can also include determining when essentially complete fluid exchanges are made to the equipment without need for additional input.

Method for on-line monitoring of quality and condition of non-aqueous fluids

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Mentor, OH, United States of America

David B Skursha