3m Innovative Properties Company

Minnesota Mining and Manufacturing Company

Other

Aquatechnica, Inc.

Craig Allen Perman

Mark David Gehlsen

David Loren Vall

Bonnie Weiskopf Albrecht

James B Philip, Jr

James S Stefely

Peter D Sills

Manfred E Riechert

Daniel C Duan

David W Schultz

Chester L Leach

Jason R Jacobson

Richard J Loer

Luke E Schallinger

Michael R Berrigan

William A Hendrickson

Robert A Pranis

Daniel T Chen

Todd D Alband

John E Gozum

Glen H Bayer, Jr

Taib K Ansera

Richard C Kao

Eric E Wisted

Ulrich R Schegel

Kelvin J Witcher

Hye-Ok Choi

Joanne M Bartkus

John A Blackwell

The present invention provides a well-less filtration device that includes a pre-filter layer; a support layer; and at least one layer of solid phase extraction medium disposed between the pre-filter layer and the support layer. At least a portion of the pre-filter layer, support layer and solid phase extraction medium are ultrasonically welded together to form a pattern of filter cells and land areas with the land areas being disposed between the filter cells. The filter cells of the device may be arranged to conform to a standardized array format.

Well-less filtration device

Solid phase extraction articles, well-less filtration devices, and methods of manufacturing the articles and devices are disclosed. Methods of extracting analytes from samples using the articles and devices are also disclosed. The articles, devices and methods include a solid phase extraction medium (SPE medium) that incorporates thermoplastic material, e.g., in the form of thermoplastic particles enmeshed within a fibril matrix.

Welded sample preparation articles and methods

A continuous method for making foams having uniform and/or small cell sizes and articles made with these foams are described. The method allows for adjusting or controlling cell size and cell size distribution by controlling temperature and/or blowing agent concentration. The foams feature small and/or uniform cell sizes and may be comprised of amorphous thermoplastic polymers, pressure sensitive adhesive compositions, and immiscible thermoplastic polymer compositions. A method for coextruding the foams is also described.

Uniform small cell foams and a continuous process for making same

This invention provides a one-piece multilayer article for use in solid phase extraction that includes at least two porous support layers and a solid phase extraction medium, wherein the porous support layers are thermo-mechanically attached at at least one thermo-mechanical attachment site. At least one of the porous support layers can be a prefilter layer.

Extraction articles and methods

Methods, compounds, and medicinal formulations utilizing biocompatible polymers for delivery of a drug, particularly for solubilizing, stabilizing and/or providing sustained release of drug from topical, implantable, and inhalation systems. Many of the methods, compounds, and medicinal formulations are particularly suitable for oral and/or nasal inhalation and use polymers of the formula &mdash;&lsqb;X&mdash;R &mdash;C(O)&rsqb;&mdash; wherein each R is an independently selected organic group that links the &mdash;X&mdash; group to the carbonyl group, and each X is independently oxygen, sulfur, or catenary nitrogen.

Medicinal aerosol solution formulation with biocompatible polymer

Methods, compounds, and medicinal formulations utilizing biocompatible polymers for delivery of a drug, particularly for solubilizing, stabilizing and/or providing sustained release of drug from topical, implantable, and inhalation systems. Many of the methods, compounds, and medicinal formulations are particularly suitable for oral and/or nasal inhalation and use polymers of the formula --[X--R.sup.1 --C(O)]-- wherein each R.sup.1 is an independently selected organic group that links the --X-- group to the carbonyl group, and each X is independently oxygen, sulfur, or catenary nitrogen.

Biocompatible compounds for pharmaceutical drug delivery systems

Foamed thermoplastic articles, both filled and unfilled foamed articles have a foamed density of greater than 0.03 grams per cubic centimeters (g/cm.sup.3), cell sizes in the range of 10 to 300 micrometers (.mu.m) with cell wall thicknesses of greater than 0.1 .mu.m but less than 2 .mu.m and a process for making the same.

Method of making thermoplastic foamed articles using supercritical fluid

Method of polymer impregnation

A process for separating a first component of a composition from a second component of a composition. The process involves contacting the composition with a supercritical fluid comprising 1,1,1,2-tetrafluoroethane or 1,1,1,2,3,3,3-heptafluoropropane, or a mixture thereof, in the supercritical state under conditions and for a time sufficient to remove the first component from the composition.

Supercritical fluid extraction involving hydrofluoroalkanes

Methods of impregnating various polymer substrates with an impregnation additive, by simultaneously contacting the polymer substrate with an impregnation additive, carrier liquid, and supercritical fluid are provided. The impregnation additive is substantially insoluble in the supercritical fluid, and the carrier liquid is preferably substantially insoluble in the supercritical fluid.

Methods of polymer impregnation

The present invention provides a composition in dry form, preferably in the form of a tablet, containing a combination of ingredients which upon addition to contaminated water effectively removes turbidity, metal and organic contaminants in the water and thereby makes the water safer for drinking. The composition is particularly useful for personal use so that safe drinking water can be obtained by the simple addition of the composition to the water to remove the turbidity and contaminating materials contained therein. Preferably the composition contains bentonite clay, attapulgite clay, polymeric coagulant and/or flocculent, biocide, zeolite and activated charcoal. The invention also provides a method for treating water with the composition as well as a method for making the composition.

Composition and method for purifying water

Growing community of inventors

Woodbury, MN, United States of America

Craig Allen Perman