Nitrogen-removing aquarium filter
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.
1966274 | July 1934 | Wells |
2665009 | January 1954 | Marstick |
3497065 | February 1970 | Johnson, Jr. |
3543938 | December 1970 | Busse |
Type: Grant
Filed: Jun 8, 1989
Date of Patent: Dec 14, 1993
Inventor: Forrest A. Young (Marathon, FL)
Primary Examiner: Susan J. Lucas
Assistant Examiner: M. H. Tung
Application Number: 7/363,194