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Class Information
Number: 55/DIG.39
Name: Gas separation > Electrets separator
Description:










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8668755 Membrane-free filter and/or integral framing for filter Mar. 11, 2014
8613795 Electret webs with charge-enhancing additives Dec. 24, 2013
8597405 Self-cleaning electret filter Dec. 3, 2013
8568503 Vent filter and electric device using the same Oct. 29, 2013
8535404 Membrane-free filter and/or integral framing for filter Sep. 17, 2013
8529671 Electret webs with charge-enhancing additives Sep. 10, 2013
8518152 Method for manufacturing electrostatic non-woven intake filter and electrostatic non-woven intake filter using the same Aug. 27, 2013
8506669 Pleated filter with monolayer monocomponent meltspun media Aug. 13, 2013
8323554 Method and apparatus for electric Dec. 4, 2012
8252095 Filter media for active field polarized media air cleaner Aug. 28, 2012
8167984 Multistage electrically charged agglomeration system May. 1, 2012
8105425 Air filter formed by slit and expanded layers of electrostatically enhanced material Jan. 31, 2012
8080086 Static dissipative filtration media Dec. 20, 2011
8070862 Dust collection device for sanding tool Dec. 6, 2011
7981177 Filtration media having a slit-film layer Jul. 19, 2011
7951229 Air filter formed from slit and expanded layers of electrostatically enhanced material May. 31, 2011
7927400 Static dissipative filtration media Apr. 19, 2011
7896941 Product and method of forming a gradient density fibrous filter Mar. 1, 2011
7758327 Method and apparatus for electric treatment of substrates Jul. 20, 2010
7717986 Vehicle passenger compartment air filter devices May. 18, 2010
7691186 Conductive bead active field polarized media air cleaner Apr. 6, 2010
7601192 Recirculation filter Oct. 13, 2009
7594959 Conducting gas purification filter and filter assembly Sep. 29, 2009
7553440 Method and apparatus for electric treatment of substrates Jun. 30, 2009
7501003 Composite filter media Mar. 10, 2009
7390343 Drinking water filtration device Jun. 24, 2008
7390351 Electrets and compounds useful in electrets Jun. 24, 2008
7364607 Wrought fiber sheet and filter unit Apr. 29, 2008
7311752 Electrostatic air filter Dec. 25, 2007
7294175 Personal inhalation filter Nov. 13, 2007
7258716 Microimpactor system having optimized impactor spacing Aug. 21, 2007
7244292 Electret article having heteroatoms and low fluorosaturation ratio Jul. 17, 2007
7244291 Electret article having high fluorosaturation ratio Jul. 17, 2007
7235115 Method of forming self-supporting pleated filter media Jun. 26, 2007
7195660 Pillow with air filter Mar. 27, 2007
7150780 Electrostatic air cleaning device Dec. 19, 2006
7014688 Air cleaning device Mar. 21, 2006
7004995 Triboelectric charging of wovens and knitted fabrics Feb. 28, 2006
6984259 Air disinfection apparatus Jan. 10, 2006
6966939 Multi-layer filter structure and use of a multi-layer filter structure Nov. 22, 2005
6953544 Method of making a respirator that has a fluorinated electret Oct. 11, 2005
6926961 Nonwoven blend with electret fiber Aug. 9, 2005
6923841 Filter element of an air filter with far infrared energy Aug. 2, 2005
6893990 Stable electret polymeric articles May. 17, 2005
6858057 Filter media Feb. 22, 2005
6827764 Molded filter element that contains thermally bonded staple fibers and electrically-charged microfibers Dec. 7, 2004
6811594 Filter materials and methods for the production thereof Nov. 2, 2004
6808551 Method of using fluorinated electrets Oct. 26, 2004
6808548 Three component filtration material Oct. 26, 2004
6802315 Vapor deposition treated electret filter media Oct. 12, 2004

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