The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 15, 2012
Filed:
Feb. 21, 2011
Veli E. Kalayci, Farmington, MN (US);
Douglas G. Crofoot, Burnsville, MN (US);
Timothy H. Grafe, Edina, MN (US);
Kristine M. Graham, Minnetonka, MN (US);
Veli E. Kalayci, Farmington, MN (US);
Douglas G. Crofoot, Burnsville, MN (US);
Timothy H. Grafe, Edina, MN (US);
Kristine M. Graham, Minnetonka, MN (US);
Donaldson Company, Inc., Minneapolis, MN (US);
Abstract
A web can comprise a substantially continuous fiber mass and a separation means dispersed into the fiber. The web having a preferred thickness resulting from forming a polymer material and a particulate into a fine fiber layer can have a variety of end uses. A filtration media can include a structure comprising such a web of fine fiber and a substantial volume of particulate embodiment of the separation means. The resulting fine fiber structure provides an improved filtration medium having substantial depth, thickness, and a layered structure. The improved properties of the web results from inclusion of the separation or spacer particulate.