Donaldson Comapny, Inc.

Eugene F Dunn, Iii

Andrew J Dallas

Jon Dennis Joriman

Joseph Israel

Jeremy Thomas Exley

A filter medium for use in filtering a mobile fluid made from at least a bicomponent fiber. Other fibers, particles, or other materials can also be entrained in the filter medium. The filter medium has a substantial thickness compared to filters of the prior art. The fiber length and diameter dimensions are selected to obtain desired filter characteristics including thickness, basis weight, pore size, filtration efficiency, pressure drop, burst strength, and manufacturing efficiency. Further, a multilayer filter medium can be provided with ease. Each layer can have a different composition, pore size, basis weight, and so forth, thus providing the ability to build multiple functionality into the filter media of the invention.

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Coon Rapids, MN, United States of America

Eugene F Dunn, Iii