Gas separation – With separate flow line access means or filter media passage... – Access means is clamping or coupling means for unit filter...
Reexamination Certificate
2011-03-15
2011-03-15
Smith, Duane (Department: 1776)
Gas separation
With separate flow line access means or filter media passage...
Access means is clamping or coupling means for unit filter...
C055S481000, C055S490000, C055S491000, C055S492000, C055S493000, C055S501000, C055S506000, C055S471000
Reexamination Certificate
active
07905938
ABSTRACT:
A filter frame is removably attachable to a box fan. The filter frame is adapted for receiving a standard HVAC-style filter for removing contaminants from air flow induced by the fan. In this manner, a cost-effective means for filtering a flow of air is provided for residential and commercial settings. The filter frame is adaptable to a variety of standard box fan types of different styles and dimensions. The frame is configured to accommodate standard filters, such as those readily available from retail hardware stores and home centers.
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“Filter Mounts for a Portable Fan and Methods for Mounting a Filter to a Portable Fan” Specification, Drawings, and Prosecution History of U.S. Appl. No. 11/344,749, filed Feb. 1, 2005, by Jeffrey P. Whittemore, which is stored in the United States Patent and Trademark Office (USPTO) Image File Wrapper (IFW) system.
Mills & Onello LLP
Pham Minh-Chau
Smith Duane
Zipwall LLC
LandOfFree
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