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. 18, 2010
Filed:
Mar. 02, 2006
Marcus Lotgerink-bruinenberg, Hagen, DE;
Marcus Lotgerink-Bruinenberg, Hagen, DE;
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A vehicle passenger compartment air filter device comprising a filtration medium comprising a nonwoven web of electret charged thermoplastic microfibers as a filter layer, said microfibers having an effective fiber diameter of greater than 10 μm and comprising a thermoplastic resin having a resistivity greater than 1014 ohm·cm and an additive selected from fluorochemical compounds or oligomers, organic triazine compounds or oligomers, hindered amine compounds, aromatic amine compounds, nitrogen containing hindered phenols, metal containing hindered phenols and mixtures thereof; said web having a basis weight less than 60 g/m2; and a gas adsorption layer comprising an adsorbent particle loaded layer and optionally further comprising a support layer and/or a cover layer bonded to said adsorbent layer; the basis weight of adsorbent particles in gas adsorption layer being at least 150 g/m2; wherein the filter layer is upstream from the gas adsorption layer and wherein the filter layer and gas adsorption layer are co-pleated and substantially non-bonded to one another except optionally at one or more of the outer edges of the filtration medium.