US 11,713,255 B2
Water filter cartridge
Harry Joseph Knopke, Grand Rapids, MI (US); Todd Alan Kercher, Holland, MI (US); Jon Harold Bechtel, Franklin, TN (US); and Jay Everett VandenBrink, Holland, MI (US)
Assigned to Aqua Chira International Incorporated, Holland, MI (US)
Filed by Aqua Clara International Incorporated, Holland, MI (US)
Filed on Jul. 1, 2021, as Appl. No. 17/365,467.
Application 17/365,467 is a continuation in part of application No. 16/177,654, filed on Nov. 1, 2018, granted, now 11,053,137.
Claims priority of provisional application 62/580,508, filed on Nov. 2, 2017.
Prior Publication US 2021/0323839 A1, Oct. 21, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C02F 1/28 (2023.01); C02F 1/00 (2023.01)
CPC C02F 1/283 (2013.01) [C02F 1/003 (2013.01); C02F 2201/006 (2013.01); C02F 2307/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A disposable water filter cartridge for use in a residential gravity-feed pitcher, said water filter cartridge comprising:
a filter housing defining a chamber having an upper inlet opening and at least one lower outlet opening having a combined total area of about 0.03 to 0.04 square inches; and
a filter media disposed in said chamber, said filter media comprising a granular mixture of at least 6 grams of agglomerated nanoparticles of anatase titania crystal titanium dioxide interspersed with less than or equal to 100 grams of granular activated charcoal;
wherein said at least one lower outlet opening is sized to limit a flow rate through said filter media to at least about 0.3 liters per minute at gravity-feed pressure in the residential gravity-feed water filter pitcher.