Appeal No. 96-0298
Application 07/920,230
a fiber in a filter medium. Claim 1 is representative of the claimed subject matter and reads as
follows:
1. A method of modifying the triboelectric properties of a fiber, in a filter
medium, comprising the steps of:
(a) selecting a fiber appropriate for the use conditions having a known or
unknown triboelectric value; and
(b) altering as needed said triboelectric value of the fiber through one of (i)
chemical reaction of said fiber with a preselected reagent, (ii) ionic bonding of a
preselected reagent to said fiber and (iii) absorption of a preselected reagent into said
fiber to embody said fiber with a predictable and consistent triboelectric value, based
on the reagent utilized and the characteristics of the underlying fiber.
References of Record
The following references of record are relied upon by the examiner as evidence of
obviousness:
Young et al. (Young) 3,574,790 Apr. 13, 1971
Edward R. Frederick (Frederick (A)), “Some Effects of Electrostatic Charges in
Fabric Filtration,” Journal of the Air Pollution Control Association, Vol. 24,
No. 12, pages 1164-68 (December 1974).
Edward R. Frederick (Frederick (B)), Electrostatic Effects in Fabric Filtration,
Carnegie-Mellon University, Pittsburgh, Penn., July 24, 1978.
Edward R. Frederick (EPA), "Electrostatic Effects in Fabric Filtration: Volume II.
Triboelectric Measurements and Bag Performance," EPA Report No. EPA-
600/7-78-142b, July 1978.
Hawley, G.G., The Condensed Chemical Dictionary, pages 427, 482, 782, 784, 785
(8th Edition, Reinhold Publishing Corporation, 1971).
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