Gas separation: processes – Electric or electrostatic field – Including baffling – deflection – or restriction of gas flow
Reexamination Certificate
2006-03-07
2006-03-07
Chiesa, Richard L. (Department: 1724)
Gas separation: processes
Electric or electrostatic field
Including baffling, deflection, or restriction of gas flow
C055S300000, C055S302000, C055S385100, C055S385300, C055S486000, C055S521000, C055S528000, C055SDIG030, C055SDIG033, C055SDIG035, C095S273000, C095S280000, C095S287000, C096S067000, C096S069000, C096S226000, C210S493500, C210S505000
Reexamination Certificate
active
07008465
ABSTRACT:
An improved cartridge, typically in cylindrical or panel form that can be used in a dry or wet/dry vacuum cleaner. The cartridge is cleanable using a stream of service water, or by rapping on a solid object, or by using a compressed gas stream, but can provide exceptional filtering properties even for submicron particulate in the household or industrial environment. The cartridge has a combination of nanofiber filtration layer on a substrate. The nanofiber and substrate are engineered to obtain a maximum efficiency at reasonable pressure drop and permeability. The improved cartridge constitutes at least a substrate material and at least a layer including a non-woven, fine fiber separation layer.
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Gogins Mark A.
Grafe Timothy H.
Graham Kristine M.
Chiesa Richard L.
Donaldson & Company, Inc.
Merchant & Gould P.C.
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