Well-less filtration device

Details Well-less filtration device Well-less filtration device

2007-12-25

2007-12-25

Warden, Jill (Department: 1743)

Chemical apparatus and process disinfecting, deodorizing, preser

Control element responsive to a sensed operating condition

C422S267000

Reexamination Certificate

active

10167370

ABSTRACT:
The present invention provides a well-less filtration device that includes a pre-filter layer; a support layer; and at least one layer of solid phase extraction medium disposed between the pre-filter layer and the support layer. At least a portion of the pre-filter layer, support layer and solid phase extraction medium are ultrasonically welded together to form a pattern of filter cells and land areas with the land areas being disposed between the filter cells. The filter cells of the device may be arranged to conform to a standardized array format.

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Sovetov A.N. et al.: “Manufacture of filter systems from caprone cloth by ultrasonic ‘separating’ welding” Welding Production, vol. 29, No. 1, 1982, p. 7 XP002145387 abstract.

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