Patent · US Active

Water-filtering media and filters

US8187474B2 · kind B2 · utility

10Cited by

15References

19Claims

0Family size

Assignees

Inventors

Mark Freeman · South Park Township, US
Jon J. Freeman · Channelview, US
Clarence S. Freeman · Channelview, US

Key dates

Filing date	Aug 15, 2008
Grant date	May 29, 2012
Priority date	—
Expiry date	Oct 12, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC10G33/06
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

In at least some embodiments, a system for removing contaminants from fluids includes a fluid inlet and a fluid outlet. The system also includes a fluid pump between the fluid inlet and the fluid outlet and a filter material between the fluid inlet and the fluid outlet. The filter material comprises a dual-valence polymer with negative valence monomer groups and positive valence monomer groups, the negative valence being stronger than the positive valence.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.