Nitrogen-removing aquarium filter

[54] NITROGEN-REMOVING AQUARIUM FILTER

[76] Inventor: Forrest A. Young, 2970 Dolphin Dr., Marathon, Fla. 33050

[**] Term: 14 Years [21] Appl. No.: 363,194

[22] Filed: Jun. 8,1989

[52] U.S. CI D23/210

[58] Field of Search D23/2O0, 207-210,

D23/316; D30/101, 106; 210/169, 301, 323.1, 416.2, 416.3, 470, 445, 231, 321.75, 321-384, 456, 488, 227-228

[56] References Cited

U.S. PATENT DOCUMENTS

1,966,274 7/1934 Wells 210/445 X

2,665,009 1/1954 Marstick 210/445 X

3,497,065 2/1970 Johnson, Jr 210/231

3,543,938 12/1970 Busse 210/231 X

Primary Examiner—Susan J. Lucas
Assistant Examiner—M. H. Tung

The ornamental design for a nitrogen-removing aquarium filter, as shown and described.

DESCRIPTION

FIG. 1 is a top plan view of a nitrogen-removing aquarium filter showing my new design; FIG. 2 is a side elevational view thereof, all sides being identical;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a cross-sectional view thereof, taken on line

4—4 of FIG. 2;

FIG. 5 is a top plan view of a second embodiment thereof;

FIG. 6 is a cross-sectional view thereof, taken on line

6— 6 of FIG. 5;

FIG. 7 is a cross-sectional view thereof, taken on line

7— 7 of FIG. 6;

FIG. 8 is a top plan view of a third embodiment thereof, the third embodiment is the same as the first except for a circular configuration;

FIG. 9 is a cross-sectional view thereof, taken on line 9—9 of FIG. 8;

FIG. 10 is a top perspective view of the original embodiment;

FIG. 11 is a side elevational view of the second embodiment thereof, all sides being identical; and, FIG. 12 is a side elevational view of the third embodiment thereof, all sides, being identical.