US Patent No: 5,322,537

Number of patents in Portfolio can not be more than 2000

Exhaust gas filter and method for making the same

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ATTORNEY / AGENT: (SPONSORED)
 

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Abstract

An exhaust gas filter for internal combustion engines and having a honeycomb structure comprises a ceramic fiber and an inorganic binder. The ceramic fiber consists essentially of Al.sub.2 O.sub.3 and SiO.sub.2. The inorganic binder includes Al.sub.2 O.sub.3 and SiO.sub.2 to bind the ceramic fiber. The inorganic binder is of a single glass phase or of a mixed phase of a glass phase and a crystal phase both having the same crystal structure in the temperature range of 20.degree. to 1200.degree. C. In the inorganic binder, a crystal such as quartz which produces abnormal expansion due to crystal phase transition is excluded, and occurrence of cracking is prevented.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.OSAKA27275

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kimura, Kunio Tosu, JP 43 644
Nakamura, Kenichi Zama, JP 177 1704

Cited Art

Patent Info (Count) # Cites Year
 
THE DOW CHEMICAL COMPANY (3)
5,098,455 Regenerable exhaust gas filter element for diesel engines 59 1990
5,194,154 Structure for filter or heat exchanger, composed of a fused single crystal acicular ceramic 38 1991
5,198,007 Filter including a porous discriminating layer on a fused single crystal acicular ceramic support, and method for making the same 50 1991
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (2)
4,652,286 Exhaust gas filter 105 1985
5,194,078 Exhaust filter element and exhaust gas-treating apparatus 46 1992
 
NGK INSULATORS, LTD. (2)
4,340,403 Ceramic honeycomb filter 34 1980
5,069,697 Porous ceramic honeycomb filter and method of producing the same 33 1989
 
ASAHI GLASS COMPANY, LIMITED (1)
5,198,006 Ceramic filter for a dust-containing gas and method for its production 24 1991
 
CERAMIQUES ET COMPOSITES (1)
4,921,616 Alveolar ceramic filters for high melting metals 15 1988
 
CORNING GLASS WORKS (1)
4,420,316 Filter apparatus and method of making it 94 1982
 
CORNING INCORPORATED (1)
5,114,581 Back-flushable filtration device and method of forming and using same 41 1991
 
FOSECO INTERNATIONAL LIMITED (1)
4,894,070 Filtration of fluid media 25 1988
 
GENERAL MOTORS CORPORATION (1)
4,364,761 Ceramic filters for diesel exhaust particulates and methods for making 66 1981
 
METAULLICS SYSTEMS CO., L.P. (1)
5,177,035 Molten metal filter and method for making same 16 1990
 
NORTON COMPANY (1)
4,946,487 High temperature filter 15 1988
 
UNIVERSAL POROSICS, INC. (1)
5,185,018 Structural fibrosics 3 1991

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
DONALDSON COMPANY, INC. (17)
5,902,364 Conical filter 100 1996
5,895,574 Rolled liquid filter using fluted media 90 1996
5,820,646 Inline filter apparatus 183 1996
5,792,247 Integrated resonator and filter apparatus 98 1996
5,772,883 Slanted inline filter 87 1996
D396098 Conical filter 82 1997
6,048,386 Integrated resonator and filter apparatus 44 1998
7,488,365 Filter element using corrugated media sheet 8 2002
7,997,425 Fluted filter medium and process for its manufacture 2 2003
7,329,326 Method of making a fluted filter media for air filter 19 2003
6,892,854 Muffler with catalytic converter arrangement; and method 5 2003
7,451,594 Exhaust flow distribution device 1 2005
7,340,888 Diesel particulate matter reduction system 3 2006
7,862,640 Low temperature diesel particulate matter reduction system 1 2007
8,110,151 Exhaust flow distribution device 1 2007
8,268,053 Fluted filter media 0 2008
7,997,071 Exhaust flow distribution device 1 2008
 
FLEETGUARD, INC. (15)
6,669,913 Combination catalytic converter and filter 26 2000
6,444,006 High temperature composite ceramic filter 37 2000
6,776,814 Dual section exhaust aftertreatment filter and method 14 2001
6,544,310 Exhaust aftertreatment filter with particulate distribution pattern 22 2001
6,582,490 Pre-form for exhaust aftertreatment control filter 32 2001
6,540,816 Regenerable filter with localized and efficient heating 16 2001
6,601,385 Impactor for selective catalytic reduction system 51 2001
6,449,947 Low pressure injection and turbulent mixing in selective catalytic reduction system 48 2001
7,211,226 Catalyst and filter combination 11 2002
6,722,123 Exhaust aftertreatment device, including chemical mixing and acoustic effects 21 2002
6,712,869 Exhaust aftertreatment device with flow diffuser 25 2002
7,052,532 High temperature nanofilter, system and method 48 2002
6,946,012 Filter and forming system 18 2003
7,393,386 Exhaust aftertreatment filter with residual stress control 0 2005
7,258,719 Filter and forming system 9 2005
 
GEO2 TECHNOLOGIES, INC. (9)
7,578,865 Method of forming a porous substrate having inorganic bonds 6 2006
7,486,962 Extruded porous substrate having inorganic bonds 8 2006
7,640,732 Method and apparatus for filtration of a two-stroke engine exhaust 1 2006
8,039,050 Method and apparatus for strengthening a porous substrate 0 2006
7,855,163 Low coefficient of thermal expansion bonding system for a high porosity ceramic body and methods of manufacture 1 2008
8,057,568 Extruded porous substrate and products using the same 0 2008
7,938,877 Low coefficient of thermal expansion materials including modified aluminosilicate fibers and methods of manufacture 3 2008
7,901,480 Extruded porous substrate having inorganic bonds 0 2009
7,862,641 Extruded porous substrate and products using the same 2 2009
 
NELSON INDUSTRIES, INC. (3)
6,375,700 Direct flow filter 38 2000
6,511,599 Multi-element cylindrical filter with equalized flow 49 2000
6,482,247 Multi-panel fluid filter with equalized contaminant passages 36 2000
 
3M INNOVATIVE PROPERTIES COMPANY (2)
7,404,840 Chemically stabilized .beta.-cristobalite and ceramic bodies comprising same 6 2002
7,201,572 Ceramic fiber composite and method for making the same 1 2003
 
CUMMINS FILTRATION IP, INC. (2)
7,235,124 High temperature nanofilter, system and method 3 2006
7,967,887 Exhaust aftertreatment filter with reduced maximum temperature 1 2006
 
ET US HOLDINGS LLC (2)
6,918,755 Fuel-fired burner with skewed electrode arrangement 1 2004
7,258,723 Particulate filter assembly and associated method 2 2004
 
FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. (2)
6,978,901 Ceramic multilayer filters and method for producing the same 1 1999
6,551,369 Ceramic flat membrane and method for producing the same 0 2001
 
GE02 TECHNOLOGIES, INC. (2)
7,781,372 Fiber-based ceramic substrate and method of fabricating the same 0 2007
7,938,876 Low coefficient of thermal expansion materials including nonstoichiometric cordierite fibers and methods of manufacture 2 2008
 
GENERAL MOTORS CORPORATION (2)
5,714,228 Ceramic catalytic converter substrate 18 1995
5,731,562 Method of making a ceramic catalytic converter open cell substrate with rounded corners 11 1997
 
IBIDEN CO., LTD. (2)
8,192,517 Ceramic honeycomb structural body 0 2006
8,029,591 Inorganic fiber aggregate, method for manufacturing inorganic fiber aggregate, honeycomb structure, method for manufacturing honeycomb structure, and exhaust gas purifier 0 2007
 
CATERPILLAR INC. (1)
6,893,487 Power generation aftertreatment system having a particulate filter dimensioned to be interchangeable with a muffler 9 2002
 
CORNING INCORPORATED (1)
6,673,300 Method for plugging selected cells in a honeycomb 17 2002
 
DOW GLOBAL TECHNOLOGIES INC. (1)
7,438,739 Catalyzed soot filter 1 2005
 
DOW GLOBAL TECHNOLOGIES LLC (1)
8,334,043 Cement to make thermal shock resistant ceramic honeycomb structures and method to make them 0 2009
 
GEOZ TECHNOLOGIES, INC. (1)
8,038,759 Fibrous cordierite materials 0 2008
 
GLOBAL STRATEGIC MATERIALS, LLC (1)
7,658,778 Ceramic filters formed from photocurable pre-ceramic polymers 1 2003
 
MANN+HUMMEL GMBH (1)
7,713,324 Filter 0 2006
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1)
5,846,276 Exhaust gas filter 31 1996
 
MENARDI MIKROPUL, LLC (1)
6,214,072 Ceramic coated filter medium and internal support 11 1998
 
NGK INSULATORS, LTD. (1)
6,716,512 Honeycomb structure and process for production thereof 12 2001
 
NICHIAS CORPORATION (1)
6,344,073 Dehumidifying material, dehumidifying element and manufacturing method therefor 0 2000
 
OHCERA CO., LTD. (1)
7,550,025 Honeycomb filter for clarifying exhaust gas and method for manufacture thereof 5 2004