US 12,290,771 B2Granted

Nanofiber filter wraps

AssigneeUltra Small Fibers, LLC

InventorsWilliam H. Hofmeister, Robert A. Van Wyk, Collin D. Anderson

Life of this patent

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Abstract

A nanofiber filter wrap is a filter element comprising a polymer film including a first surface, a second surface opposite the first surface, an array of nanofibers extending from the first surface, a first end, a second end opposite the first end, and opposing first and second edges extending from the first end to the second end. The polymer film is wound or folded to form a plurality of spaced adjacent layers defining interlayer gaps extending through the filter element from the first edge to the second edge substantially normal to a basal plane defined by the second edge of the polymer film. A fluid flowed can be flowed through the interlayer gaps to contact at least a portion of the array of nanofibers whereby a contaminant contained in the fluid is at least partially filtered from the fluid.

Claims13

Dependent claims

A filter element, comprising:

a first polymer film including a first surface, a second surface opposite the first surface, an array of nanofibers extending from the first surface, a first end, a second end opposite the first end, and opposing first and second edges extending from the first end to the second end;
and
a second polymer film including a first surface, a second surface opposite the first surface, a second array of nanofibers extending from the first surface, a first end, a second end opposite the first end, and opposing first and second edges extending from the first end to the second end;
wherein the first and second polymer films are spiral wound together such that the second surface of the first polymer film is fixed to the second surface of the second polymer film, and the first surface of the first polymer film faces and is spaced from the first surface of the second polymer film so as to defined therebetween interlayer gaps through which a fluid can be flowed to contact the first and second arrays of nanofibers and thereby remove at least one contaminant from the fluid.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 17/707,733Filed 29 Mar 2022
Published: US 2023/0311036 A15 Oct 2023
Granted: 6 May 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

B01D 39/1607
Of organic material, e.g. synthetic fibres: the material being fibrous
B01D 39/1692
Of organic material, e.g. synthetic fibres: other shaped material, e.g. perforated or porous sheets
B01D 2239/025
Types of fibres, filaments or particles, self-supporting or supported materials: comprising nanofibres
B01D 2239/0435
Additives and treatments of the filtering material: electret