Filter module for water dispensing device

The invention is a multi-stage water filter designed for a liquid dispenser. Water first passes through a pre-filter containing a hollow carbon block, then through a hollow fiber membrane filter. Finally, it enters a composite filter housing where it flows through a second hollow carbon block, an electrostatic adsorption filter, and a third carbon block, all arranged with specific flow paths. The claims detail this precise sequence and internal structure.

Why it matters: The invention combines established filter technologies within a complex, custom-molded housing. While manufacturing costs for such intricate plastic components may have incrementally improved since 2022, no specific technological breakthrough in filter media or electrostatic adsorption is evident from the claims.

Status: Not in forceListed as no longer active. The specific reason is not in the record we hold.
How hard to build: ModerateCustom molded housing, specialized filter media

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