Category: Issued Patents

Porous Filter Media

Posted on by legna880

 

Disclosed is a filter element from removing contaminants from water comprised of first filter media particles having a first particle size and second media particles having a second particle size and methods for making such a filter element. The first media particles are adhered to surfaces of the second media particles. A binder connects the second media particles with one another so that interstitial spaces are formed between second media particles. A portion of the smaller first filter media particles are positioned within the interstitial spaces. According to one embodiment of the disclosure water flows through the filter element at a flux greater than about 1.5 ml/min/cm.sup.2 has a pressure drop less than 20 psi.

Link via USPTO:

http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&co1=AND&d=PG01&s1=%22LOMBARDO+Andrew%22.IN.&OS=IN/%22LOMBARDO+Andrew%22&RS=IN/%22LOMBARDO+Andrew%22

Google Patents PDF:

https://patentimages.storage.googleapis.com/1d/39/82/9c70ced5cbdf81/US20210171359A1.pdf

Electrostatic removal of colloidal, soluble, and insoluble materials from a fluid

Posted on by legna880

US Patent Number: 10,376,900

ABSTRACT
A filter that contains an adsorbent to remove the soluble portion of the contaminant, and then some form of electrostatic attraction additive. The electrostatic attraction additive would serve to pull the colloidal and particulate portion of the contaminant out of fluid, which could be held indefinitely, or be used to hold while the contaminant is allowed to solubilize and then be removed by the adsorbent. The electrostatic attraction additive could either be positively or negatively charged depending on the surface charge of the particulates that are in the fluid, and includes particles or fibers charged with charged polymers, zeolites, cation or anion exchange resin, powdered alumina, or nano-alumina.

 

Link via USPTO

Carafe filter with air lock prevention feature (continuation)

Posted on by legna880

US Patent Number: US 10,335,717

Abstract

A filter for gravity-fed applications, having filter media with a hollow center, the filter being generally prone to a degradation or cessation in fluid flow due to air entrapment or air lock within the filter housing cavity, which develops during filtering. A diffuser element is introduced to pierce the entrapped air bubble, the diffuser element being an elongated structure connected to the filter housing top end cap and extending through the entrapped air bubble to the filter media.

Link via USPTO: https://bit.ly/2G6G8Hr

 

 

FILTERING CONTAINER

Posted on by legna880

Filtering container

US Patent Application Number: US10272371

Abstract:

A collapsible bag or compressible bottle container for accepting, holding, and filtering fluid. Fluid is filtered upon entry to the container or filtered upon egress. The filter media resides either in a removable cap, or in a second fluid-tight compartment attached to, and in fluid communication with, the container body. A one-way valve with unique one-time connection to a fluid source mitigates potential contamination from container overuse. A second collapsible layer is used in conjunction with the collapsible bag to accept compressed air that provides rigidity for the container body.

 

Google Patents PDF:

https://patentimages.storage.googleapis.com/d8/36/de/354da311c65dd7/US10272371.pdf

Method of making a filter media with an enriched binder (Continuation)

Posted on by legna880

US Patent Number: US 9289702
Abstract
Water filtration media having a charged material affixed directly to binder material used in the fabrication of the filter media. A microbiological interception enhancing agent is added to the binder directly. The media having a charged material and a microbiological interception enhancing agent both affixed directly on or in a binder material is then combined with core filter media and prepared as a filtration media. A filter is prepared from the treated filter media.
 
Link via USPTO

https://patentimages.storage.googleapis.com/97/50/fb/d12f6cec32f2e0/US9289702.pdf

Carafe filter with air lock prevention feature

Posted on by legna880

US Publication Number: US 9849407
ABSTRACT
 
A filter for gravity-fed applications, having filter media with a hollow center, the filter being generally prone to a degradation or cessation in fluid flow due to air entrapment or air lock within the filter housing cavity, which develops during filtering. A diffuser element is introduced to pierce the entrapped air bubble, the diffuser element being an elongated structure connected to the filter housing top end cap and extending through the entrapped air bubble to the filter media.
 
Link via Google Patents

Method of making a filter media with an enriched binder

Posted on by legna880

US Patent Number: US 8622224 B2
[space_20]

ABSTRACT
Water filtration media having a charged material affixed directly to binder material used in the fabrication of the filter media. A microbiological interception enhancing agent is added to the binder directly. The media having a charged material and a microbiological interception enhancing agent both affixed directly on a binder material is then combined with core filter media and prepared as a filtration media. A filter is prepared from the treated filter media.
[space_20]
 

Formation and immobilization of small particles by using polyelectrolyte multilayers

Posted on by legna880
US Publication Number: US 9,718,013
[space_20]
ABSTRACT
A method for forming and immobilizing small particles on a filter substrate using a first and second polymer solution, a solution of sodium bromide and a solution of a metal salt. The method adjusts the pH of at least one of the first and second polymer solutions, immersing the filter substrate in the first polymer solution and immersing the filter substrate in the second polymer solution. The method includes repeating the steps of immersing the filter substrate in the first solution and the second solution alternately until desired number of layers is achieved. The method allows for the filter substrate to be immersed in the solution of the metal salt and subsequently in the solution of sodium bromide.
[space_20]

Uses of fibrillated nanofibers and the removal of soluble, colloidal, and insoluble particles from a fluid

Posted on by legna880
US Patent number: US 8002990

[space_20]
ABSTRACT

A filter for removing soluble, colloidal, and insoluble particles from a fluid, including lead using a first filter media for filtering soluble material from the fluid, a second filter media, adjacent and in fluid communication with, the first filter media, for filtering soluble material from said fluid, wherein the first and second filter media create a physical non-soluble particle barrier at their interface for capturing non-soluble particles, that when retained at the interface, become soluble over time in the fluid, and are subsequently removed by the second filter media. At least one of the filter media can be fibrillated nanofibers that are loaded with finely subdivided media of powdered ion exchange resins. A third filter media may be placed between the first and second filter media to enhance capturing and dissolving the physical non-soluble particles.
[space_20]