US Patent No: 7,316,723

Number of patents in Portfolio can not be more than 2000

Air filter with fine fiber and spun bonded media

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Abstract

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Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
DONALDSON COMPANY, INC.MINNEAPOLIS, MN631

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chung, Hoo Y Bloomington, MN 21 630
Crofoot, Douglas G Burnsville, MN 22 807
Gogins, Mark A Roseville, MN 38 1608
Hall, John R B Burnsville, MN 14 466
Weik, Thomas M Deephaven, MN 37 1375

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Minnesota Mining and Manufacturing Company (7)
4,874,399 Electret filter made of fibers containing polypropylene and poly(4-methyl-1-pentene) 122 1988
4,917,942 Nonwoven filter material 120 1988
5,176,952 Modulus nonwoven webs based on multi-layer blown microfibers 82 1991
5,411,576 Oily mist resistant electret filter media and method for filtering 129 1994
5,496,507 Method of charging electret filter media 191 1994
5,472,481 Oily mist resistant electret filter media 119 1995
5,763,078 Filter having corrugated nonwoven webs of polymeric microfiber 39 1996
 
Other [Check patent profile for assignment information] (2)
4,842,924 Novel compositions based on reinforcement with microfibrillar networks of rigid-rod polymers 35 1986
5,453,314 Single use disposable protective wearing apparel 30 1994
 
NASHUA CORPORATION (1)
6,348,432 Heat sensitive coating, recording material and methods of manufacture 16 2000
 
WIX FILTRATION CORP. (1)
5,895,510 Air filter assembly 45 1997
 
BBA NONWOVENS SIMPSONVILLE, INC. (1)
5,593,768 Nonwoven fabrics and fabric laminates from multiconstituent fibers 65 1994
 
VIRGINIA COMMONWEALTH UNIVERSITY (1)
2003/0088,266 Method of fusing electroprocessed matrices to a substrate 35 2002
 
ORACLE AMERICA, INC. (1)
6,509,765 Selectable resistor and/or driver for an integrated circuit with a linear resistance 20 2001
 
BBA GROUP PLC (1)
6,604,925 Device for forming a filtering material 35 1999
 
UNIVERSITY OF TENNESSEE RESEARCH FOUNDATION (1)
5,273,565 Meltblown fabric 48 1992
 
AKAMAI TECHNOLOGIES, INC. (1)
* 2009/0132,648 CONTENT DELIVERY AND GLOBAL TRAFFIC MANAGEMENT NETWORK SYSTEM 70 2009
 
CIBA-GEIGY CORPORATION (1)
4,469,606 Stabilization systems for fiber finishes 29 1982
 
AMERICAN FILTRONA CORPORATION (1)
4,594,162 Pleated filter and method and apparatus for fabricating same 59 1984
 
Donaldson Company, Inc. (18)
4,650,506 Multi-layered microfiltration medium 146 1986
5,104,537 High pressure hydraulic spin-on filter 102 1990
5,082,476 Filtration arrangement and method 176 1990
5,203,201 On-line web filtration efficiency test method 34 1991
5,364,456 Filtration arrangement and method 82 1993
5,672,399 Filter material construction and method 180 1995
5,820,646 Inline filter apparatus 275 1996
5,853,442 Bolt connector assembly having retainer ring construction and reduced diameter shank portion 33 1997
6,171,684 Filter material construction and method 94 1997
5,954,849 Filter element 57 1997
D425189 Combined filter element and frame therefor 127 1998
6,123,751 Filter construction resistant to the passage of water soluble materials; and method 50 1998
6,090,173 Air filter assembly for filtering air with particulate matter 49 1998
6,673,136 Air filtration arrangements having fluted media constructions and methods 176 2001
6,716,274 Air filter assembly for filtering an air stream to remove particulate matter entrained in the stream 41 2001
* 6,743,273 Polymer, polymer microfiber, polymer nanofiber and applications including filter structures 130 2001
6,800,117 Filtration arrangement utilizing pleated construction and method 44 2001
* 6,924,028 Polymer, polymer microfiber, polymer nanofiber and applications including filter structures 55 2003
 
AMERICAN AIR FILTER COMPANY, INC. (1)
5,672,188 High capacity filter media 30 1996
 
HOLLINGSWORTH & VOSE COMPANY (1)
6,554,881 Filter media 94 2000
 
GORE HOLDINGS, INC. (1)
5,026,591 Coated products and methods for making 113 1989
 
BOARD OF REGENTS OF THE UNIVERSITY OF NEBRASKA (1)
6,265,333 Delamination resistant composites prepared by small diameter fiber reinforcement at ply interfaces 191 1998
 
Firma Carl Freudenberg (1)
6,193,773 Dust filter bag 27 1999
 
Dynic Corporation (1)
5,198,294 Composite air-filtering material 20 1991
 
The Procter & Gamble Company (1)
4,468,428 Hydrophilic microfibrous absorbent webs 103 1982
 
DENDREON PHARMACEUTICALS, INC. (1)
5,843,442 Blood coagulation protein antagonists and uses therefor 45 1995
 
KURASHIKI BOSEKI KABUSHIKI KAISHA (1)
4,826,519 Multilayer filter element 27 1988
 
MEADWESTVACO CORPORATION (1)
4,900,671 Biocatalytic process for preparing phenolic resins using peroxidase or oxidase enzyme 112 1987
 
KX TECHNOLOGIES LLC (1)
6,630,016 Microporous filter media, filtration systems containing same, and methods of making and using 75 2002
 
UBE INDUSTRIES, LTD. (1)
4,370,290 Process for producing aromatic polyimide filaments 40 1981
 
Safety Components Fabric Technologies, Inc. (1)
6,192,520 Water resistant protective garment for fire fighters 37 1998
 
TOKUYAMA SODA KABUSHIKI KAISHA (1)
5,238,735 Microporous shaped article and process for preparation thereof 53 1990
 
SHAKESPEARE COMPANY, LLC (1)
4,992,515 Nylon terpolymer crosslinked with melamine formaldehyde for coating sewing threads 32 1990
 
ALS Enterprises, Inc. (1)
6,134,718 Odor absorbing clothing 59 1999
 
STOUT MEDICAL GROUP, INC. (1)
2003/0195,611 Covering and method using electrospinning of very small fibers 72 2002
 
THE UNIVERSITY OF LIVERPOOL (2)
4,689,186 Production of electrostatically spun products 86 1985
4,842,505 Apparatus for producing fibrous structures electrostatically 65 1987
 
PALL CORPORATION (2)
4,340,479 Process for preparing hydrophilic polyamide membrane filter media and product 230 1980
4,759,782 Coalescing filter for removal of liquid aerosols from gaseous streams 99 1987
 
TEIJIN LIMITED (1)
5,633,746 Magneto-optical recording medium 24 1995
 
NEENAH GESSNER GMBH (2)
5,437,910 Multi-ply filter lasminate/composite for manufacturing vacuum cleaner filter bags 34 1993
6,395,046 Dust filter bag containing nano non-woven tissue 70 2000
 
ENTEGRIS, INC. (1)
6,354,443 Surface modified porous membrane and process 48 1997
 
AVENT, INC. (1)
6,037,281 Cloth-like, liquid-impervious, breathable composite barrier fabric 79 1996
 
RG Delaware, Inc. (1)
5,980,755 Methods and apparatus for monitoring a filter bed by differential pressure 23 1997
 
GENERAL ELECTRIC COMPANY (1)
5,166,246 Polyetherimide-polyamide compositions 26 1989
 
Nicast Corporation Ltd. (1)
2002/0084,178 Method and apparatus for manufacturing polymer fiber shells via electrospinning 43 2001
 
STERLING CHEMICALS INTERNATIONAL, INC. (1)
4,929,502 Fibrillated fibers and articles made therefrom 42 1986
 
HYDROMEDICA, LLC (1)
* 6,855,743 Reinforced, laminated, impregnated, and composite-like materials as crosslinked polyvinyl alcohol hydrogel structures 47 2001
 
3M INNOVATIVE PROPERTIES COMPANY (7)
5,908,598 Fibrous webs having enhanced electret properties 106 1995
5,981,038 Laminate preventing transmissions of viral pathogens 22 1995
6,068,799 Method of making electret articles and filters with increased oily mist resistance 41 1997
5,919,847 Composition useful for making electret fibers 59 1997
5,968,635 Fibrous webs useful for making electret filter media 61 1997
5,976,208 Electret filter media containing filtration enhancing additives 71 1997
6,002,017 Compounds useful as resin additives 51 1997
 
FREUDENBERG NONWOVENS LIMITED PARTNERSHIP (1)
4,860,382 Protective garment 44 1987
 
BLAUER MANUFACTURING COMPANY, INC. (1)
5,466,515 Weather protective fabric combination, outerwear constructed therefrom 17 1994
 
Nippondenso Co., Ltd. (1)
5,993,580 Process for manufacturing a filter element 34 1997
 
The Lubrizol Corporation (1)
* 2006/0231,487 Coated filter media 37 2005
 
TORAY INDUSTRIES, INC. (4)
4,476,186 Ultrafine fiber entangled sheet and method of producing the same 65 1983
* 4,603,083 Ultra-high-tenacity polyvinyl alcohol fiber and process for producing same 30 1984
* 4,698,194 Process for producing ultra-high-tenacity polyvinyl alcohol fiber 17 1986
5,340,522 Process for producing polyvinyl alcohol multifilament yarn 17 1993
 
BHA GROUP, INC. (1)
6,110,249 Filter element with membrane and bicomponent substrate 82 1999
 
OLIN MICROELECTRONIC CHEMICALS, INC. (1)
5,863,701 Polymers containing protected styrene and unprotected hydroxbenzyl (meth) acrylamides 31 1998
 
SHIN-ETSU CHEMICAL CO., LTD. (1)
6,048,661 Polymeric compounds, chemically amplified positive type resist materials and process for pattern formation 40 1998
 
JOHNS MANVILLE INTERNATIONAL, INC. (3)
5,800,586 Composite filter media 52 1996
5,948,344 Composite filter media 40 1998
5,993,501 Composite filter media 67 1998
 
Exxon Research and Engineering Company (1)
5,269,925 Filter comprising multiple layers of non-woven filter fabric of decreasing porosity 22 1992
 
EMD MILLIPORE CORPORATION (1)
5,980,759 Dual media filter cartridge construction 33 1995
 
BAXTER INTERNATIONAL INC. (1)
6,032,807 Methods for correlating average fiber diameter with performance in complex filtration media 31 1996
 
AAF-MCQUAY INC. (1)
2002/0192,468 Method, apparatus and product for manufacturing nanofiber media 23 2001
 
KIMBERLY-CLARK WORLDWIDE, INC. (4)
4,824,451 Melt-blown filter medium 67 1987
5,597,645 Nonwoven filter media for gas 79 1994
6,015,764 Microporous elastomeric film/nonwoven breathable laminate and method for making the same 137 1997
6,322,604 Filtration media and articles incorporating the same 39 2000
 
CUNO INCORPORATED (1)
4,915,886 Method of manufacturing nylon microporous hollow fiber membrane 30 1988
 
LIFESHIELD SCIENCES LLC (2)
2004/0158,312 Braided endoluminal device having tapered filaments 21 2003
2004/0158,312 Braided endoluminal device having tapered filaments 21 2003
 
H-TECH, INC. (1)
5,358,638 Multiple layer filter bag including abrasion-resistant material 55 1993
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
BHA GROUP (1)
* 2011/0016,838 HIGH PERFORMANCE GAS TURBINE INLET FILTER (HEPA) USING MEMBRANE MEDIA 5 2009
 
GENERAL ELECTRIC COMPANY (1)
9,200,568 Inlet air filtration system with self-cleaning filter bag 0 2014
 
AVALON NANOFIBER LIMITED (2)
* 8,303,693 Nanofiber filter facemasks and cabin filters 1 2007
* 2008/0264,259 NANOFIBER FILTER FACEMASKS AND CABIN FILTERS 17 2007
 
Board of Regents of the University to Texas System (1)
8,721,319 Superfine fiber creating spinneret and uses thereof 0 2009
 
BHA ALTAIR, LLC (3)
8,206,481 HEPA (H-10) performance synthetic nonwoven and nanofiber composite filter media 1 2009
8,262,780 High performance gas turbine inlet filter (HEPA) using membrane media 4 2009
9,120,046 Filter media and filter device comprised thereof 0 2012
 
INTUITIVE SURGICAL OPERATIONS, INC. (2)
7,959,703 Fluted filter with integrated frame 6 2008
* 2009/0320,423 Fluted Filter with Integrated Frame 10 2008
 
Donaldson Company, Inc. (10)
8,118,901 Fine fiber media layer 6 2009
* 2010/0064,645 FINE FIBER MEDIA LAYER 7 2009
8,029,588 Fine fiber media layer 6 2010
* 2011/0067,369 FINE FIBER MEDIA LAYER 36 2010
8,366,797 Fine fiber media layer 4 2011
8,512,431 Fine fiber media layer 1 2012
8,721,756 Filter construction for use with air in-take for gas turbine and methods 2 2012
9,435,056 Fibers made from soluble polymers 0 2012
8,709,118 Fine fiber media layer 1 2013
9,474,994 Filter media and elements 0 2014
 
BLACKBERRY LIMITED (1)
* 2007/0200,766 Adaptively tunable antennas and method of operation therefore 76 2007
 
BALDWIN FILTERS, INC. (15)
* 2006/0091,061 Filter assembly with sealing system 55 2004
* 2006/0091,064 Filter apparatus with separable seal support frame 63 2004
* 2007/0186,528 Fluted filter apparatus 42 2006
7,753,982 Filter with drained jacket, seal indicator/lock means, and seal baffle 17 2006
* 2008/0135,471 Method and apparatus for winding a filter element 10 2006
7,909,954 Method and apparatus for winding a filter media pack 3 2007
* 2008/0011,896 Method And Apparatus For Winding A Filter Media Pack 21 2007
8,277,531 Filter element 3 2007
8,048,187 Filter frame attachment and fluted filter having same 2 2008
* 2010/0000,934 FILTER ASSEMBLY WITH SEALING SYSTEM 9 2009
7,931,725 Fluted filter apparatus 16 2009
8,177,877 Filter frame attachment and fluted filter having same 6 2011
8,206,625 Filter element 2 2011
8,540,790 Filter element 0 2012
8,551,375 Filter element 0 2013
 
CLARCOR INC. (7)
8,777,599 Multilayer apparatuses and methods for the production of microfibers and nanofibers 2 2012
8,778,240 Split fiber producing devices and methods for the production of microfibers and nanofibers 0 2012
8,709,309 Devices and methods for the production of coaxial microfibers and nanofibers 1 2012
8,658,067 Apparatuses and methods for the deposition of microfibers and nanofibers on a substrate 0 2012
8,647,540 Apparatuses having outlet elements and methods for the production of microfibers and nanofibers 0 2012
8,647,541 Apparatuses and methods for the simultaneous production of microfibers and nanofibers 0 2012
9,394,627 Apparatuses having outlet elements and methods for the production of microfibers and nanofibers 0 2015
 
HOLLINGSWORTH & VOSE COMPANY (11)
8,608,817 Meltblown filter medium 6 2008
* 2009/0120,048 Meltblown Filter Medium 13 2008
8,986,432 Meltblown filter medium, related applications and uses 0 2009
* 2010/0000,411 MELTBLOWN FILTER MEDIUM, RELATED APPLICATIONS AND USES 10 2009
8,679,218 Filter media with a multi-layer structure 3 2010
8,950,587 Filter media suitable for hydraulic applications 0 2010
* 2011/0079,553 FILTER MEDIA SUITABLE FOR HYDRAULIC APPLICATIONS 7 2010
* 2011/0147,976 MELTBLOWN FILTER MEDIUM 11 2010
9,149,748 Multi-layered filter media 0 2013
9,283,501 Filter media with a multi-layer structure 0 2014
9,149,749 Pre-coalescing multi-layered filter media 0 2014
 
BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM (5)
8,231,378 Superfine fiber creating spinneret and uses thereof 0 2009
* 2009/0280,325 METHODS AND APPARATUSES FOR MAKING SUPERFINE FIBERS 17 2009
* 2009/0280,207 SUPERFINE FIBER CREATING SPINNERET AND USES THEREOF 10 2009
* 2009/0269,429 SUPERFINE FIBER CREATING SPINNERET AND USES THEREOF 14 2009
8,828,294 Superfine fiber creating spinneret and uses thereof 0 2012
* Cited By Examiner

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