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Class Information
Number: 210/777
Name: Liquid purification or separation > Processes > Separating > Including precoating filter medium with filter aid
Description: Process in which a basic separating member or retainer is coated with a filter medium or filter aid prior to the purification step.

Sub-classes under this class:

Class Number Class Name Patents
210/778 With or by addition to prefilt 156

Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8691096 Oil filters containing strong base and methods of their use Apr. 8, 2014
8663475 Diatomaceous earth products containing reduced soluble metal levels, processes for reducing soluble metal levels in diatomaceous earth products, and methods of using the same Mar. 4, 2014
8613804 System and method for dry cleaning articles Dec. 24, 2013
8591745 System and method for filtration of liquids Nov. 26, 2013
8580117 System and method for replacing resist filter to reduce resist filter-induced wafer defects Nov. 12, 2013
8512570 Wastewater treatment method Aug. 20, 2013
8454919 Production of precipitated silica Jun. 4, 2013
8414766 Serviceable oil filter device Apr. 9, 2013
8394279 Method for regenerating a filter aid Mar. 12, 2013
8323495 Method of operating a bioreactor and filtration system Dec. 4, 2012
8226830 Wastewater purification with nanoparticle-treated bed Jul. 24, 2012
8211311 Method for treating ship ballast water with membrane Jul. 3, 2012
8123819 System and method for dry cleaning articles Feb. 28, 2012
8105492 Methods for recharging nanoparticle-treated beds Jan. 31, 2012
8070951 Method for removing contaminants from liquids using membrane filtration in combination with particle adsorption to reduce fouling Dec. 6, 2011
8029680 Filtration apparatus and filtration method Oct. 4, 2011
7993533 Method for regenerating an auxiliary filtering agent Aug. 9, 2011
7807060 Filter with resuspension of solids Oct. 5, 2010
7767125 Method for producing polymer blends suited for use as filters Aug. 3, 2010
7713427 Water filtration and recycling for fabrication equipment May. 11, 2010
7514010 Water filtering method and apparatus Apr. 7, 2009
7484626 Water nano-filtration device Feb. 3, 2009
7410605 Solution film-forming method Aug. 12, 2008
7381323 Filtration apparatus Jun. 3, 2008
7351345 Method for manufacturing a module for treating a fluid Apr. 1, 2008
7294233 System and method for altering the tack of materials using an electrohydraulic discharge Nov. 13, 2007
7247234 Method for combined processing of diesel fuel Jul. 24, 2007
7244366 Water filtration and recycling for stone fabrication equipment for exterior and architectural stone Jul. 17, 2007
7074338 Filtering method and filtering device Jul. 11, 2006
7018547 Filtration covering apparatus Mar. 28, 2006
7001528 Use of aqueous binders in producing filter materials Feb. 21, 2006
6974544 Membrane filtration Dec. 13, 2005
6929754 Solid/liquid separation system for multiphase converters Aug. 16, 2005
6896818 Water filtration and recycling for stone fabrication equipment May. 24, 2005
6887390 Optimized solid/liquid separation system for multiphase converters May. 3, 2005
6852229 Method for preparing high-purity ionic liquids Feb. 8, 2005
6833077 Sequential swinging precoat removal and renewal system, filter so equipped and method Dec. 21, 2004
6830679 Filtration device Dec. 14, 2004
6800197 Continuously operable rotating drum pressure differential filter, method and systems Oct. 5, 2004
6736981 Particulate polymers as filter aids May. 18, 2004
6733680 Use of particulate polymers as filter aids for aqueous liquids May. 11, 2004
6692644 Process for recovering oil and sulfonates from filtration panel Feb. 17, 2004
6669848 Methods of treating commercial grade preservatives to remove undesirable odors and flavors Dec. 30, 2003
6660172 Precoat filtration media and methods of making and using Dec. 9, 2003
6649068 Filtration of pulp mill liquids Nov. 18, 2003
6616827 Filtration method of copper electrolyte Sep. 9, 2003
6585901 Method of draining water from low-consistency water-fiber suspensions Jul. 1, 2003
6562245 Crushed foam glass filter aid and method of use May. 13, 2003
6555014 Method for filtering a liquid by the addition of a filtering aid Apr. 29, 2003
6524489 Advanced composite media Feb. 25, 2003

1 2 3 4 5

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