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

ALSO PUBLISHED AS: 20070283808

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Importance

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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, MN560

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chung, Hoo Y Bloomington, MN 40 436
Crofoot, Douglas G Burnsville, MN 42 574
Gogins, Mark A Roseville, MN 68 1249
Hall, John R B Burnsville, MN 16 372
Weik, Thomas M Deephaven, MN 62 1153

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) 119 1988
4,917,942 Nonwoven filter material 117 1988
5,176,952 Modulus nonwoven webs based on multi-layer blown microfibers 78 1991
5,411,576 Oily mist resistant electret filter media and method for filtering 126 1994
5,496,507 Method of charging electret filter media 182 1994
5,472,481 Oily mist resistant electret filter media 117 1995
5,763,078 Filter having corrugated nonwoven webs of polymeric microfiber 38 1996
 
Other [Check patent profile for assignment information] (2)
4,842,924 Novel compositions based on reinforcement with microfibrillar networks of rigid-rod polymers 34 1986
5,453,314 Single use disposable protective wearing apparel 29 1994
 
Nashua Corporation (1)
6,348,432 Heat sensitive coating, recording material and methods of manufacture 15 2000
 
WIX FILTRATION CORP. (1)
5,895,510 Air filter assembly 42 1997
 
BBA NONWOVENS SIMPSONVILLE, INC. (1)
5,593,768 Nonwoven fabrics and fabric laminates from multiconstituent fibers 60 1994
 
VIRGINIA COMMONWEALTH UNIVERSITY (1)
2003/0088,266 Method of fusing electroprocessed matrices to a substrate 33 2002
 
BBA GROUP PLC (1)
6,604,925 Device for forming a filtering material 30 1999
 
UNIVERSITY OF TENNESSEE RESEARCH CORPORATION, THE (1)
5,273,565 Meltblown fabric 48 1992
 
AKAMAI TECHNOLOGIES, INC. (1)
* 2009/0132,648 CONTENT DELIVERY AND GLOBAL TRAFFIC MANAGEMENT NETWORK SYSTEM 38 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 58 1984
 
Donaldson Company, Inc. (18)
4,650,506 Multi-layered microfiltration medium 137 1986
5,104,537 High pressure hydraulic spin-on filter 97 1990
5,082,476 Filtration arrangement and method 161 1990
5,203,201 On-line web filtration efficiency test method 32 1991
5,364,456 Filtration arrangement and method 79 1993
5,672,399 Filter material construction and method 160 1995
5,820,646 Inline filter apparatus 243 1996
5,853,442 Bolt connector assembly having retainer ring construction and reduced diameter shank portion 32 1997
6,171,684 Filter material construction and method 81 1997
5,954,849 Filter element 55 1997
D425189 Combined filter element and frame therefor 109 1998
6,123,751 Filter construction resistant to the passage of water soluble materials; and method 49 1998
6,090,173 Air filter assembly for filtering air with particulate matter 45 1998
6,673,136 Air filtration arrangements having fluted media constructions and methods 160 2001
6,716,274 Air filter assembly for filtering an air stream to remove particulate matter entrained in the stream 38 2001
* 6,743,273 Polymer, polymer microfiber, polymer nanofiber and applications including filter structures 112 2001
6,800,117 Filtration arrangement utilizing pleated construction and method 37 2001
* 6,924,028 Polymer, polymer microfiber, polymer nanofiber and applications including filter structures 46 2003
 
AMERICAN AIR FILTER COMPANY, INC. (1)
5,672,188 High capacity filter media 29 1996
 
Hollingsworth & Vose Company (1)
6,554,881 Filter media 84 2000
 
GORE HOLDINGS, INC. (1)
5,026,591 Coated products and methods for making 107 1989
 
UNIVERSITY OF NEBRASKA MEDICAL CENTER (1)
6,265,333 Delamination resistant composites prepared by small diameter fiber reinforcement at ply interfaces 172 1998
 
Firma Carl Freudenberg (1)
6,193,773 Dust filter bag 26 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 97 1982
 
Sun Microsystems, Inc. (1)
6,509,765 Selectable resistor and/or driver for an integrated circuit with a linear resistance 20 2001
 
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 107 1987
 
KX TECHNOLOGIES LLC (1)
6,630,016 Microporous filter media, filtration systems containing same, and methods of making and using 67 2002
 
UBE INDUSTRIES, LTD. (1)
4,370,290 Process for producing aromatic polyimide filaments 39 1981
 
Safety Components Fabric Technologies, Inc. (1)
6,192,520 Water resistant protective garment for fire fighters 34 1998
 
Dendreon Corporation (1)
5,843,442 Blood coagulation protein antagonists and uses therefor 45 1995
 
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 31 1990
 
ALS Enterprises, Inc. (1)
6,134,718 Odor absorbing clothing 58 1999
 
STOUT MEDICAL GROUP, INC. (1)
2003/0195,611 Covering and method using electrospinning of very small fibers 63 2002
 
UNIVERSITY OF LIVERPOOL, THE (2)
4,689,186 Production of electrostatically spun products 80 1985
4,842,505 Apparatus for producing fibrous structures electrostatically 64 1987
 
Pall Corporation (2)
4,340,479 Process for preparing hydrophilic polyamide membrane filter media and product 228 1980
4,759,782 Coalescing filter for removal of liquid aerosols from gaseous streams 95 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 65 2000
 
ENTEGRIS, INC. (1)
6,354,443 Surface modified porous membrane and process 31 1997
 
AVENT, INC. (1)
6,037,281 Cloth-like, liquid-impervious, breathable composite barrier fabric 75 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 40 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 41 2001
 
3M INNOVATIVE PROPERTIES COMPANY (7)
5,908,598 Fibrous webs having enhanced electret properties 100 1995
5,981,038 Laminate preventing transmissions of viral pathogens 21 1995
6,068,799 Method of making electret articles and filters with increased oily mist resistance 39 1997
5,919,847 Composition useful for making electret fibers 58 1997
5,968,635 Fibrous webs useful for making electret filter media 59 1997
5,976,208 Electret filter media containing filtration enhancing additives 69 1997
6,002,017 Compounds useful as resin additives 51 1997
 
FREUDENBERG NONWOVENS LIMITED PARTNERSHIP (1)
4,860,382 Protective garment 43 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 21 2005
 
TORAY INDUSTRIES, INC. (4)
4,476,186 Ultrafine fiber entangled sheet and method of producing the same 64 1983
* 4,603,083 Ultra-high-tenacity polyvinyl alcohol fiber and process for producing same 29 1984
* 4,698,194 Process for producing ultra-high-tenacity polyvinyl alcohol fiber 16 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 75 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 50 1996
5,948,344 Composite filter media 38 1998
5,993,501 Composite filter media 62 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 32 1995
 
BAXTER INTERNATIONAL INC. (1)
6,032,807 Methods for correlating average fiber diameter with performance in complex filtration media 29 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 63 1987
5,597,645 Nonwoven filter media for gas 75 1994
6,015,764 Microporous elastomeric film/nonwoven breathable laminate and method for making the same 119 1997
6,322,604 Filtration media and articles incorporating the same 38 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 10 2003
2004/0158,312 Braided endoluminal device having tapered filaments 10 2003
 
H-TECH, INC. (1)
5,358,638 Multiple layer filter bag including abrasion-resistant material 53 1993
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
AVALON NANOFIBER LIMITED (1)
* 8,303,693 Nanofiber filter facemasks and cabin filters 0 2007
 
Board of Regents of the University to Texas System (1)
8,721,319 Superfine fiber creating spinneret and uses thereof 0 2009
 
FIBERIO TECHNOLOGY CORPORATION (6)
8,777,599 Multilayer apparatuses and methods for the production of microfibers and nanofibers 0 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 0 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
 
BHA ALTAIR, LLC (2)
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 1 2009
 
Intuitive Surgical Operations, Inc. (1)
7,959,703 Fluted filter with integrated frame 4 2008
 
Donaldson Company, Inc. (6)
8,118,901 Fine fiber media layer 3 2009
8,029,588 Fine fiber media layer 2 2010
8,366,797 Fine fiber media layer 1 2011
8,512,431 Fine fiber media layer 0 2012
8,721,756 Filter construction for use with air in-take for gas turbine and methods 0 2012
8,709,118 Fine fiber media layer 0 2013
 
Baldwin Filters, Inc. (9)
7,753,982 Filter with drained jacket, seal indicator/lock means, and seal baffle 14 2006
7,909,954 Method and apparatus for winding a filter media pack 2 2007
8,277,531 Filter element 3 2007
8,048,187 Filter frame attachment and fluted filter having same 1 2008
7,931,725 Fluted filter apparatus 11 2009
8,177,877 Filter frame attachment and fluted filter having same 5 2011
8,206,625 Filter element 2 2011
8,540,790 Filter element 0 2012
8,551,375 Filter element 0 2013
 
Hollingsworth & Vose Company (4)
8,608,817 Meltblown filter medium 4 2008
8,986,432 Meltblown filter medium, related applications and uses 0 2009
8,679,218 Filter media with a multi-layer structure 1 2010
8,950,587 Filter media suitable for hydraulic applications 0 2010
 
BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM (2)
8,231,378 Superfine fiber creating spinneret and uses thereof 0 2009
8,828,294 Superfine fiber creating spinneret and uses thereof 0 2012
* Cited By Examiner

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