Liquid purification or separation – Structural installation – Flume stream type
Reexamination Certificate
2007-04-24
2007-04-24
Drodge, Joseph (Department: 1723)
Liquid purification or separation
Structural installation
Flume stream type
C052S012000, C052S309400, C210S473000, C210S483000, C210S510100
Reexamination Certificate
active
10751510
ABSTRACT:
The gutter foam filter elements are generally triangular, four-foot lengths of flexible plastic open-cell foam material placed in and extending the full length of a conventional “K” type or similar roof gutter. The foam filter elements may be inserted within the gutter below gutter spikes. The foam material is an open-pore polyether foam of 10–20 cells per square inch which allows rainwater to travel through the filter while excluding leaves. The foam is generally in the form of a right triangle and so disposed in the gutter as to have one side extending along the back of the gutter and the other side of the triangle spanning the open space across the upper open portion of the gutter. The sloped wall defines a void in the lower front portion of the gutter for rainwater flow to a downspout. The lower corner of the element is truncated forming a lower support wall.
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U.S. Appl. No. 60/448,082, filed Feb. 18, 2003, Specification and Drawings, Groth et al.
Drodge Joseph
Litman Richard C.
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