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Publication numberUSD282767 S
Publication typeGrant
Application numberUS 06/365,892
Publication dateFeb 25, 1986
Filing dateApr 6, 1982
Publication number06365892, 365892, US D282767 S, US D282767S, US-S-D282767, USD282767 S, USD282767S
InventorsFrederick M. Shofner
Original AssigneePpm, Inc.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Filter unit
US D282767 S
Abstract  available in
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  1. The ornamental design for a filter unit, as shown.

FIG. 1 is a perspective view of a filter unit of my new appearance design as it appears in operation suspended from overhead and with filter media in place;

FIG. 2 is an additional perspective view of the filter unit of FIG. 1 showing the bottom, rear and opposite sides not visible in FIG. 1; and

FIG. 3 is a perspective view from the same orientation as FIG. 1, but showing the appearance of the filter unit with the filter media and rolls removed.

Non-Patent Citations
1Modufil™ Sales Brochure No. 107-10/82 (Oct. 1982) prepared by Assignee, ppm, Inc., Knoxville, TN.
2Modufil™ Sales Brochure No. 112-2/83 (Feb. 1983) prepared by Assignee, ppm, Inc., Knoxville, TN.
3Modufil™ Sales Brochure No. 113-3/83 (Mar. 1983) prepared by Assignee, ppm, Inc., Knoxville, TN.
4Sales Brochure, Northern Air Corporation, "Modular Air Filtration Systems Model AR-2000" (exact date unknown).
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7922008 *Jul 10, 2009Apr 12, 2011The Procter & Gamble CompanyWater filter materials and water filters containing a mixture of microporous and mesoporous carbon particles
U.S. ClassificationD23/209