Water filter having a filter use time indicator

Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow

Reexamination Certificate

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Details

C210S138000, C210S123000, C210S449000, C200S08400B, C340S623000

Reexamination Certificate

active

07094334

ABSTRACT:
The described embodiments of the present invention include a water filter having a float portion with a magnet that moves up and down due to water flow to activate a switch for tracking the use time of the filter.

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patent: 2004/0069696 (2004-04-01), Warren et al.

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