Porous UV-emitting semiconductor on porous substrate as sterilizing filter made by filtering suspended semiconductor particles

This invention describes a filter designed to clean fluids like water or air. It works by having a porous material coated with tiny semiconductor particles that glow with ultraviolet light when electricity is applied. As fluid passes through, the filter physically traps harmful substances, while the UV light simultaneously sterilizes and breaks them down. The patent's claims specifically detail the method for manufacturing this filter, focusing on how to deposit these light-emitting particles onto a porous base.

Why it matters: Efficient UV-emitting electroluminescent materials and precise particle deposition were nascent in 2003. Advances in UV LED technology and nanomaterial synthesis now make this more feasible.

Status: ExpiredProtection ended and was never renewed
How hard to build: SpecializedElectroluminescent semiconductor particles, porous deposition

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