3m Innovative Properties Company

William J Feil, Iii

Bradley W Eaton

Andrew H Tilstra

Robert A Astle

Michael R Berrigan

Mark R Stouffer

Ryan K McKenney

Ryan D Erickson

Richard A Prince

Torrence B Stahl

Michael D Zenner

Thund Y Watt

Mark W Schimmel

Andrew W G Horvath

Adhesive spray nozzle

A firestopping apparatus including a sleeve with at least one pair of airflow-blocking elements, at least one element of which is movable towards, and away from, the other element.

Firestopping apparatus with airflow-blocking elements

A firestopping apparatus including a sleeve with at least first and second airflow-blocking elements, with at least the first airflow-blocking element comprising a resiliently compressible body and being slidably movable generally along a long axis of the sleeve.

Fluid filtration articles, including composite nonwoven fibrous webs, and methods of making and using such articles as gas or liquid filtration elements. The articles include a population of coarse microfibers having a population median diameter of at least 1 micrometer (&#x3bc;m) formed as a first layer, and a population of fine fibers having a population median diameter less than 10 &#x3bc;m formed as a second layer adjoining the first layer. At least one of the fiber populations may be oriented. In one implementation, the coarse microfibers and fine fibers are polymeric, the coarse microfibers have a population median diameter of at least 10 &#x3bc;m, and the fine fibers have a population median diameter less than 10 &#x3bc;m. In another implementation, the population of fine fibers has a population median diameter less than 1 &#x3bc;m. Optionally, one or both of the first and second layers may include particulates.

Fluid filtration articles and methods of making and using the same

Aspects of the present disclosure provide composite carbon blocks with improved capacity for the removal of contaminants such as THMs (trihalomethanes) and trace VOCs (volatile organic compounds) found in water. In one aspect, a filtration matrix comprises a polymeric binder and an adsorptive media comprising activated carbon having a bulk density of 0.54 (0.57, or even 0.60) g/cc or greater. The carbon BET surface area can be 1100 (950, or even 550) m/g or less. The polymeric binder can be ultra high molecular weight polyethylene. Also provided are methods of making filtration matrixes.

Filter media

Provided are filter elements and methods of making and using the same where the filter elements are suitable for liquid filtration and contain particle-loaded meltblown fiber webs. A filter element comprises: a porous article comprising a web of self-supporting nonwoven polymeric fibers and a plurality of sorbent particles enmeshed in the web, the article comprising a first surface and a second surface; a liquid-impermeable housing surrounding the porous article; an inlet in fluid communication with the first surface; and an outlet in fluid communication with the second surface. Spiral-wound webs, web-covered blocks, and stacked disks of webs are also provided.

Liquid filtration systems

Growing community of inventors

Woodbury, MN, United States of America

William J Feil, Iii