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:
Mar. 12, 1985
Filed:
Jun. 14, 1984
Harold T Pontius, Dublin, OH (US);
Columbus Industries, Inc., Ashville, OH (US);
Abstract
An improved filter construction for odor adsorption adapted to fit into a frame provided with front and rear support faces. The filter media consists of one or more sheets of non-woven material impregnated with activated carbon particles. Each sheet is provided with a plurality of slit and expanded openings to permit gaseous flow through said sheet. The sheet material comprises a combination of cellulose and synthetic fibers in a weight percentage range of between at least 30 to 50 percent of cellulose fibers and 1 to 10 percent of synthetic fibers wherin the combination of the two fibers represent at least 40 percent of the total composition of the sheet. The activated carbon content is between 35 to 50 percent of the total composition by weight. A latex binder material and a wet strength resin are included for fabrication of the sheet and to reduce dusting of the charcoal. A flame retardant material may be included to the composition of the sheet in an amount sufficient to meet fire codes standard as required.