Water contaminant indicators

Details Water contaminant indicators Water contaminant indicators

2007-12-18

2007-12-18

Drodge, Joseph (Department: 1723)

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Transparent

C210S264000, C210S256000, C210S335000, C210S464000, C210S473000, C222S189060, C222S189080

Reexamination Certificate

active

11460538

ABSTRACT:
A filtering device for a gravity-flow liquid treatment system includes a first filter component that can be either exposed or adjacent to a substantially transparent region in at least a portion of a filter housing. The first filter component is capable of providing a visual indication of exposure to at least one contaminant. The contaminants for which the first filter component can indicate exposure include particles, inorganic, and organic contamination. Particle contamination is indicated by a change in color of the first filter component through particle collection. Inorganic and organic contaminants are indicated by reaction with at least one agent capable of undergoing a color-change reaction in response to at least one contaminant. Water treatment systems and filtration devices that include at least one agent capable of undergoing a color-change reaction and thus give a visual indication of exposure to at least one contaminant for use in both gravity-driven and pressure-driven environments are also described.

REFERENCES:
patent: 1411975 (1922-04-01), Matson
patent: 4504389 (1985-03-01), Rundzaitis
patent: 4770768 (1988-09-01), Lang
patent: 5076912 (1991-12-01), Belz et al.
patent: 5595659 (1997-01-01), Huang et al.
patent: 6221416 (2001-04-01), Nohren, Jr.
patent: 7125434 (2006-10-01), Yavorsky et al.
patent: 2004/0029266 (2004-02-01), Barbera-Guillem

Affiliated with

Also associated with

Rating

Water contaminant indicators does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Water contaminant indicators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Water contaminant indicators will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3885092