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USD618761S1 - Filter block for liquid filtration - Google Patents

Filter block for liquid filtration Download PDF

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Publication number
USD618761S1
USD618761S1 US29/334,387 US33438709F USD618761S US D618761 S1 USD618761 S1 US D618761S1 US 33438709 F US33438709 F US 33438709F US D618761 S USD618761 S US D618761S
Authority
US
United States
Prior art keywords
filter block
liquid filtration
view
cross
filtration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US29/334,387
Inventor
Roger P. Reid
Bruce D. Saaski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Omnipure Filter Co
Original Assignee
Omnipure Filter Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Omnipure Filter Co filed Critical Omnipure Filter Co
Priority to US29/334,387 priority Critical patent/USD618761S1/en
Assigned to OMNIPURE FILTER COMPANY, INC. reassignment OMNIPURE FILTER COMPANY, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: REID, ROGER P., SAASKI, BRUCE D.
Application granted granted Critical
Publication of USD618761S1 publication Critical patent/USD618761S1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

FIG. 1 is a front perspective view of the invented design for a filter block for liquid filtration.
FIG. 2 is a front view of the filter block of FIG. 1, with the back view being the same as front view.
FIG. 3 is a side view of the filter block of FIG. 1, with right and left side views being the same.
FIG. 4 is a top view of the filter block of FIG. 1.
FIG. 5 is a bottom view of the filter block of FIG. 1.
FIG. 6 is a cross-sectional, side view of the filter block of FIG. 1 taken along 6—6 in FIG. 4, the cross-section being taken axially front-to-back through the center of the filter block, and wherein stippling indicates the cut surface.
FIG. 7 is a cross-sectional, perspective side view of the filter block of FIG. 1 taken along 7—7 in FIG. 1, the cross-section being taken axially front-to-back through the center of the filter block, and, therefore, FIG. 7 being a perspective view of FIG. 6; and,
FIG. 8 is a cross-sectional, perspective front view of the filter block of FIG. 1 taken along 8—8 in FIG. 1, the cross-section being taken axially side-to-side through the middle of the filter block, and wherein stippling indicates the cut surface.

Claims (1)

  1. The ornamental design for a filter block for liquid filtration, as shown and described.
US29/334,387 2009-03-25 2009-03-25 Filter block for liquid filtration Expired - Lifetime USD618761S1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US29/334,387 USD618761S1 (en) 2009-03-25 2009-03-25 Filter block for liquid filtration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US29/334,387 USD618761S1 (en) 2009-03-25 2009-03-25 Filter block for liquid filtration

Publications (1)

Publication Number Publication Date
USD618761S1 true USD618761S1 (en) 2010-06-29

Family

ID=42271729

Family Applications (1)

Application Number Title Priority Date Filing Date
US29/334,387 Expired - Lifetime USD618761S1 (en) 2009-03-25 2009-03-25 Filter block for liquid filtration

Country Status (1)

Country Link
US (1) USD618761S1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100215552A1 (en) * 2009-02-25 2010-08-26 Ka Shing Wu UV liquid storage and dispensing device
USD644713S1 (en) * 2010-01-21 2011-09-06 Walton Frank A Filter
USD647595S1 (en) 2007-09-20 2011-10-25 Omnipure Filter Company, Inc. Filter block for liquid filtration
US9700912B2 (en) 2012-06-27 2017-07-11 William K. Leonard Fluid transport media
USD803349S1 (en) * 2016-10-20 2017-11-21 Hong Kong Ecoaqua Co., Limited Filter unit
USD806831S1 (en) * 2016-10-27 2018-01-02 Hong Kong Ecoaqua Co., Limited Filter unit
USD820385S1 (en) * 2016-12-14 2018-06-12 Brita Lp Water filter housing
USD836182S1 (en) * 2016-10-25 2018-12-18 Rafael Bellavita Countertop water filtration system
USD846069S1 (en) * 2017-11-09 2019-04-16 Qingdao Ecopure Filter Co., Ltd. Water filter
US20200009482A1 (en) * 2018-07-07 2020-01-09 Paragon Water Systems, Inc. Water filter cartridge having an air vent

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US532939A (en) 1895-01-22 Filter
US2580209A (en) 1949-01-12 1951-12-25 Robert D Wiley Filter for fluids
US2720278A (en) 1954-02-23 1955-10-11 Master Pneumatic Inc Fluid filtering device
US3375933A (en) 1965-02-01 1968-04-02 Fram Corp Semi-rigid polymer encapsulated filter medium containing an unencapsulated adsorbent material
US3538020A (en) 1966-09-23 1970-11-03 Kata Mfg & Filtering Co The Fluid purification device containing a cartridge of polymer entrapped aggregate particles
US3721072A (en) 1970-07-13 1973-03-20 Calgon Corp Bonded activated carbon air filter
US3746642A (en) 1971-04-20 1973-07-17 Minnesota Mining & Mfg Sintered powdered metal filter
US3788486A (en) 1971-09-30 1974-01-29 Minnesota Mining & Mfg Filter
US4306971A (en) 1979-05-17 1981-12-22 Chemie Brita Gerate Ing. Karl Itter Nachfolger Water purifying apparatus
US4664683A (en) 1984-04-25 1987-05-12 Pall Corporation Self-supporting structures containing immobilized carbon particles and method for forming same
US4665050A (en) 1984-08-13 1987-05-12 Pall Corporation Self-supporting structures containing immobilized inorganic sorbent particles and method for forming same
US4666600A (en) 1984-03-17 1987-05-19 Brita Wasserfilter Gmbh Insert for a water purifier
US4753728A (en) 1986-04-07 1988-06-28 Amway Corporation Water filter
US4859386A (en) 1986-04-07 1989-08-22 Amway Corporation Method of making a water filter
EP0345381A2 (en) 1988-06-07 1989-12-13 The Clorox Company Liquid filter
US4895648A (en) 1988-04-30 1990-01-23 Brita Wasser-Filter-Systeme Gmbh Filter cover for a purification insert in a water treatment device with a hollow tube
US4969996A (en) 1988-03-26 1990-11-13 Brita Wasser-Filter-Systeme Gmbh Water purification device with an intake funnel
US4980073A (en) 1988-07-06 1990-12-25 The Clorox Company Valve stem for a filter device
US5017318A (en) 1986-04-07 1991-05-21 Amway Corporation Method of making a water filter
US5019311A (en) 1989-02-23 1991-05-28 Koslow Technologies Corporation Process for the production of materials characterized by a continuous web matrix or force point bonding
US5024764A (en) 1989-03-17 1991-06-18 Ametek, Inc. Method of making a composite filter
US5076912A (en) 1989-06-07 1991-12-31 Brita Wasser-Filter-Systeme Gmbh Ion exchange device with chamber having indicator means
US5189092A (en) 1991-04-08 1993-02-23 Koslow Technologies Corporation Method and apparatus for the continuous extrusion of solid articles
US5225078A (en) 1992-03-04 1993-07-06 Ametek, Inc. Plymouth Products Division Pour-through pitcher filter
US5256285A (en) 1990-12-27 1993-10-26 Kanebo, Ltd. Filter container with double construction
US5344558A (en) 1993-02-16 1994-09-06 Amway Corporation Water filter cartridge
US5352274A (en) 1993-05-10 1994-10-04 Blakley Richard L Air filter and method
US5443735A (en) 1991-09-12 1995-08-22 Pall Corporation Method and device for inhibiting bacterial growth on sorbent media
US5486285A (en) 1993-06-10 1996-01-23 The Clorox Company Air inlet valve for water cooler
USD380535S (en) * 1993-09-10 1997-07-01 Carsten Joergensen Combined filter cartridge and lid therefor
US5679248A (en) 1995-12-19 1997-10-21 Kimberly-Clark Worldwide, Inc. Coextruded blocks and applications therefor
USD398184S (en) 1996-09-30 1998-09-15 The Clorox Company Water pitcher
USD405157S (en) 1998-02-23 1999-02-02 The Clorox Company Water filter cartridge
US5873995A (en) 1997-05-06 1999-02-23 The Clorox Company End-of-life indicator for water treatment device
US5922803A (en) 1997-02-26 1999-07-13 Koslow; Evan E. Thin-walled, extruded activated carbon filter
USD415922S (en) 1997-09-29 1999-11-02 The Clorox Company Water pitcher and cover
US5980743A (en) 1996-08-06 1999-11-09 Brita Wasser-Filter-Systeme Gmbh Filter means with fabric insert
USD416163S (en) 1999-03-09 1999-11-09 The Clorox Company Water pitcher
US6056809A (en) 1996-10-18 2000-05-02 Rick L. Chapman High efficiency permanent air filter and method of manufacture
US6074550A (en) 1997-07-19 2000-06-13 Brita Wasser-Filger-Systeme Gmbh Device for indicating the depletion of purifying agent
US6099728A (en) 1996-08-13 2000-08-08 Brita Wasser-Filter-Systeme Gmbh Filter cartridge with a sieve in an outlet aperture
USD435084S (en) 1999-12-06 2000-12-12 The Clorox Company Water filter
US6238552B1 (en) * 1998-09-04 2001-05-29 Roy T. Shannon Universal insert for a water purifier
USRE37216E1 (en) 1996-04-24 2001-06-12 Kx Industries, L.P. Water treatment cartridge and base
US6280824B1 (en) 1999-01-29 2001-08-28 3M Innovative Properties Company Contoured layer channel flow filtration media
US6290848B1 (en) 1997-04-16 2001-09-18 Pur Water Purification Products, Inc. Filter cartridge for gravity-fed water treatment devices
US6290646B1 (en) 1999-04-16 2001-09-18 Cardiocom Apparatus and method for monitoring and communicating wellness parameters of ambulatory patients
US6368504B1 (en) 2000-11-06 2002-04-09 Alticor Inc. Carbon block water filter
US6395190B1 (en) 1996-02-26 2002-05-28 Kx Industries, L.P. Process employing thin-walled, extruded activated carbon filter
US20020062740A1 (en) 2000-09-28 2002-05-30 Brukov Nikolay V. Method and apparatus for continuous extrusion of filter elements
US6413303B2 (en) 1998-03-12 2002-07-02 Koninklijke Philips Electronics N.V. Activated carbon air filters
US20020195407A1 (en) 1997-03-18 2002-12-26 Ehud Levy Purfication media
US6524477B1 (en) 1997-08-27 2003-02-25 Rich Buhler Gravity-flow filtration cartridge for the removal of microorganisms and/or other contaminants
US6565749B1 (en) 1999-07-21 2003-05-20 The Procter & Gamble Company Microorganism filter and method for removing microorganism from water
WO2003048693A1 (en) 2001-12-05 2003-06-12 Endress + Hauser Flowtec Ag Coriolis flowmeter comprising a straight tube
US20030140785A1 (en) 2002-01-31 2003-07-31 Koslow Evan E. Microporous filter media, filtration systems containing same, and methods of making and using
US6638426B1 (en) 2000-07-07 2003-10-28 The Clorox Company Water purifying apparatus
WO2004000732A1 (en) 2002-06-19 2003-12-31 Unilever Plc Water purification system
GB2390987A (en) 2002-12-17 2004-01-28 Unilever Plc A carbon containing filtration medium
US20040195180A1 (en) 2003-04-04 2004-10-07 The Clorox Company Microorganism-removing filter medium having high isoelectric material and low melt index binder
US20040251190A1 (en) 2003-04-04 2004-12-16 The Clorox Company Microorganism-removing filter medium having high isoelectric material and low melt index binder
EP1354857A4 (en) 2000-12-25 2004-12-22 Mitsubishi Rayon Co WATER CLEANER CAN AND CLEANING CARTRIDGE THEREFOR
US6841067B1 (en) 1999-11-02 2005-01-11 Brita Gmbh Filtration device for liquids
US20050072729A1 (en) 2003-10-01 2005-04-07 Bridges Michael A. Water purification cartridge
WO2005095284A1 (en) 2004-03-19 2005-10-13 Unilever N.V. Water purification system
WO2005094966A1 (en) 2004-03-16 2005-10-13 Unilever N.V. Filter media
US20060000763A1 (en) 2004-06-30 2006-01-05 Rinker Edward B Gravity flow carbon block filter
US20060021928A1 (en) 2004-04-12 2006-02-02 David Nelson Efficient Water Filters
WO2006037420A1 (en) 2004-09-30 2006-04-13 Unilever N.V. Water purification device
USD529127S1 (en) * 2005-04-15 2006-09-26 Glenn Cueman Universal water filter
WO2006121932A1 (en) 2005-05-08 2006-11-16 3M Innovative Properties Company Filter cartridge and method of construction thereof
US7169466B2 (en) 2004-05-21 2007-01-30 The Clorox Company Multiple-component binder systems for porous composite blocks
US20070215536A1 (en) 2006-03-20 2007-09-20 Filtrex Holdings, Pte Ltd Filter cartridge for gravity-fed water treatment device
US7378015B2 (en) 2003-12-18 2008-05-27 The Clorox Company Filtered water enhancements
USD579515S1 (en) 2008-01-15 2008-10-28 The Clorox Company Water filter

Patent Citations (85)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US532939A (en) 1895-01-22 Filter
US2580209A (en) 1949-01-12 1951-12-25 Robert D Wiley Filter for fluids
US2720278A (en) 1954-02-23 1955-10-11 Master Pneumatic Inc Fluid filtering device
US3375933A (en) 1965-02-01 1968-04-02 Fram Corp Semi-rigid polymer encapsulated filter medium containing an unencapsulated adsorbent material
US3538020A (en) 1966-09-23 1970-11-03 Kata Mfg & Filtering Co The Fluid purification device containing a cartridge of polymer entrapped aggregate particles
US3721072A (en) 1970-07-13 1973-03-20 Calgon Corp Bonded activated carbon air filter
US3746642A (en) 1971-04-20 1973-07-17 Minnesota Mining & Mfg Sintered powdered metal filter
US3788486A (en) 1971-09-30 1974-01-29 Minnesota Mining & Mfg Filter
US4306971A (en) 1979-05-17 1981-12-22 Chemie Brita Gerate Ing. Karl Itter Nachfolger Water purifying apparatus
US4666600A (en) 1984-03-17 1987-05-19 Brita Wasserfilter Gmbh Insert for a water purifier
US4664683A (en) 1984-04-25 1987-05-12 Pall Corporation Self-supporting structures containing immobilized carbon particles and method for forming same
US4665050A (en) 1984-08-13 1987-05-12 Pall Corporation Self-supporting structures containing immobilized inorganic sorbent particles and method for forming same
US4753728A (en) 1986-04-07 1988-06-28 Amway Corporation Water filter
US4859386A (en) 1986-04-07 1989-08-22 Amway Corporation Method of making a water filter
US5017318A (en) 1986-04-07 1991-05-21 Amway Corporation Method of making a water filter
US4969996A (en) 1988-03-26 1990-11-13 Brita Wasser-Filter-Systeme Gmbh Water purification device with an intake funnel
US4895648A (en) 1988-04-30 1990-01-23 Brita Wasser-Filter-Systeme Gmbh Filter cover for a purification insert in a water treatment device with a hollow tube
EP0345381A2 (en) 1988-06-07 1989-12-13 The Clorox Company Liquid filter
US4980073A (en) 1988-07-06 1990-12-25 The Clorox Company Valve stem for a filter device
US5019311A (en) 1989-02-23 1991-05-28 Koslow Technologies Corporation Process for the production of materials characterized by a continuous web matrix or force point bonding
US5147722A (en) 1989-02-23 1992-09-15 Koslow Technologies Corporation Process for the production of materials and materials produced by the process
US5024764A (en) 1989-03-17 1991-06-18 Ametek, Inc. Method of making a composite filter
US5076912A (en) 1989-06-07 1991-12-31 Brita Wasser-Filter-Systeme Gmbh Ion exchange device with chamber having indicator means
US5256285A (en) 1990-12-27 1993-10-26 Kanebo, Ltd. Filter container with double construction
US5189092A (en) 1991-04-08 1993-02-23 Koslow Technologies Corporation Method and apparatus for the continuous extrusion of solid articles
US5443735A (en) 1991-09-12 1995-08-22 Pall Corporation Method and device for inhibiting bacterial growth on sorbent media
US5225078A (en) 1992-03-04 1993-07-06 Ametek, Inc. Plymouth Products Division Pour-through pitcher filter
US5344558A (en) 1993-02-16 1994-09-06 Amway Corporation Water filter cartridge
US5352274A (en) 1993-05-10 1994-10-04 Blakley Richard L Air filter and method
US5486285A (en) 1993-06-10 1996-01-23 The Clorox Company Air inlet valve for water cooler
USD380535S (en) * 1993-09-10 1997-07-01 Carsten Joergensen Combined filter cartridge and lid therefor
US5679248A (en) 1995-12-19 1997-10-21 Kimberly-Clark Worldwide, Inc. Coextruded blocks and applications therefor
US6395190B1 (en) 1996-02-26 2002-05-28 Kx Industries, L.P. Process employing thin-walled, extruded activated carbon filter
USRE37216E1 (en) 1996-04-24 2001-06-12 Kx Industries, L.P. Water treatment cartridge and base
US5980743A (en) 1996-08-06 1999-11-09 Brita Wasser-Filter-Systeme Gmbh Filter means with fabric insert
US6099728A (en) 1996-08-13 2000-08-08 Brita Wasser-Filter-Systeme Gmbh Filter cartridge with a sieve in an outlet aperture
USD398184S (en) 1996-09-30 1998-09-15 The Clorox Company Water pitcher
US6056809A (en) 1996-10-18 2000-05-02 Rick L. Chapman High efficiency permanent air filter and method of manufacture
US6322615B1 (en) 1996-10-18 2001-11-27 Rick L. Chapman High efficiency permanent air filter and method of manufacture
US5922803A (en) 1997-02-26 1999-07-13 Koslow; Evan E. Thin-walled, extruded activated carbon filter
US20020195407A1 (en) 1997-03-18 2002-12-26 Ehud Levy Purfication media
US20020005377A1 (en) 1997-04-16 2002-01-17 Pur Water Purification Products, Inc. Filter cartridge for gravity-fed water treatment devices
US6290848B1 (en) 1997-04-16 2001-09-18 Pur Water Purification Products, Inc. Filter cartridge for gravity-fed water treatment devices
US5873995A (en) 1997-05-06 1999-02-23 The Clorox Company End-of-life indicator for water treatment device
US6074550A (en) 1997-07-19 2000-06-13 Brita Wasser-Filger-Systeme Gmbh Device for indicating the depletion of purifying agent
US6524477B1 (en) 1997-08-27 2003-02-25 Rich Buhler Gravity-flow filtration cartridge for the removal of microorganisms and/or other contaminants
USD415922S (en) 1997-09-29 1999-11-02 The Clorox Company Water pitcher and cover
USD405157S (en) 1998-02-23 1999-02-02 The Clorox Company Water filter cartridge
US6413303B2 (en) 1998-03-12 2002-07-02 Koninklijke Philips Electronics N.V. Activated carbon air filters
US6238552B1 (en) * 1998-09-04 2001-05-29 Roy T. Shannon Universal insert for a water purifier
US6280824B1 (en) 1999-01-29 2001-08-28 3M Innovative Properties Company Contoured layer channel flow filtration media
USD416163S (en) 1999-03-09 1999-11-09 The Clorox Company Water pitcher
US6290646B1 (en) 1999-04-16 2001-09-18 Cardiocom Apparatus and method for monitoring and communicating wellness parameters of ambulatory patients
US6565749B1 (en) 1999-07-21 2003-05-20 The Procter & Gamble Company Microorganism filter and method for removing microorganism from water
US6841067B1 (en) 1999-11-02 2005-01-11 Brita Gmbh Filtration device for liquids
USD435084S (en) 1999-12-06 2000-12-12 The Clorox Company Water filter
US6638426B1 (en) 2000-07-07 2003-10-28 The Clorox Company Water purifying apparatus
US20020062740A1 (en) 2000-09-28 2002-05-30 Brukov Nikolay V. Method and apparatus for continuous extrusion of filter elements
US6368504B1 (en) 2000-11-06 2002-04-09 Alticor Inc. Carbon block water filter
EP1354857A4 (en) 2000-12-25 2004-12-22 Mitsubishi Rayon Co WATER CLEANER CAN AND CLEANING CARTRIDGE THEREFOR
WO2003048693A1 (en) 2001-12-05 2003-06-12 Endress + Hauser Flowtec Ag Coriolis flowmeter comprising a straight tube
US20050172731A1 (en) 2001-12-05 2005-08-11 Martin Anklin Coriolis flowmeter comprising a straight tube
US20030140785A1 (en) 2002-01-31 2003-07-31 Koslow Evan E. Microporous filter media, filtration systems containing same, and methods of making and using
WO2004000732A1 (en) 2002-06-19 2003-12-31 Unilever Plc Water purification system
GB2390987A (en) 2002-12-17 2004-01-28 Unilever Plc A carbon containing filtration medium
US20040251190A1 (en) 2003-04-04 2004-12-16 The Clorox Company Microorganism-removing filter medium having high isoelectric material and low melt index binder
US20040195180A1 (en) 2003-04-04 2004-10-07 The Clorox Company Microorganism-removing filter medium having high isoelectric material and low melt index binder
US6989101B2 (en) 2003-04-04 2006-01-24 The Clorox Company Microorganism-removing filter medium having high isoelectric material and low melt index binder
US7303683B2 (en) 2003-04-04 2007-12-04 The Clorox Company Microorganism-removing filter medium having high isoelectric material and low melt index binder
US20050072729A1 (en) 2003-10-01 2005-04-07 Bridges Michael A. Water purification cartridge
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WO2005095284A1 (en) 2004-03-19 2005-10-13 Unilever N.V. Water purification system
US7297263B2 (en) 2004-04-12 2007-11-20 The Clorox Company Efficient water filters
US20060260997A1 (en) 2004-04-12 2006-11-23 The Clorox Company Efficient water filters
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WO2006121932A1 (en) 2005-05-08 2006-11-16 3M Innovative Properties Company Filter cartridge and method of construction thereof
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US7396461B2 (en) 2006-03-20 2008-07-08 Filtrex Holdings Pte, Ltd. Filter cartridge for gravity-fed water treatment device
USD579515S1 (en) 2008-01-15 2008-10-28 The Clorox Company Water filter

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Title
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD647595S1 (en) 2007-09-20 2011-10-25 Omnipure Filter Company, Inc. Filter block for liquid filtration
US20100215552A1 (en) * 2009-02-25 2010-08-26 Ka Shing Wu UV liquid storage and dispensing device
US8128820B2 (en) * 2009-02-25 2012-03-06 Mr. Chiaphua Industries Limited UV liquid storage and dispensing device
USD644713S1 (en) * 2010-01-21 2011-09-06 Walton Frank A Filter
US9700912B2 (en) 2012-06-27 2017-07-11 William K. Leonard Fluid transport media
USD803349S1 (en) * 2016-10-20 2017-11-21 Hong Kong Ecoaqua Co., Limited Filter unit
USD836182S1 (en) * 2016-10-25 2018-12-18 Rafael Bellavita Countertop water filtration system
USD806831S1 (en) * 2016-10-27 2018-01-02 Hong Kong Ecoaqua Co., Limited Filter unit
USD820385S1 (en) * 2016-12-14 2018-06-12 Brita Lp Water filter housing
USD827086S1 (en) * 2016-12-14 2018-08-28 Brita Lp Water filter housing top
USD846069S1 (en) * 2017-11-09 2019-04-16 Qingdao Ecopure Filter Co., Ltd. Water filter
US20200009482A1 (en) * 2018-07-07 2020-01-09 Paragon Water Systems, Inc. Water filter cartridge having an air vent
US11872506B2 (en) * 2018-07-07 2024-01-16 Paragon Water Systems, Inc. Water filter cartridge having an air vent

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