Inside surface of a filter element having spacer construction
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Description
FIG. 1 is a perspective view of the inside surface of a filter element having spacer construction showing our new design. This particular perspective view is normally not seen through the side walls of the filter element, but is illustrated for purposes of clarity.
FIG. 2 is a top plan view thereof; and,
FIG. 3 is a side elevational view thereof, all the sides being identical. This particular side elevational view is normally not seen through the side walls of the filter element, but us illustrated for purposes of clarity.
The broken lines which define the bounds of the claimed design form no part thereof. The broken line environmental showing is for illustrative purposes only and forms no part of the claimed design.
Referenced Cited
U.S. Patent Documents
Other references
| 4135899 | January 23, 1979 | Gauer |
- Declaration of Thomas G. Miller (with attached Exhibits A and B).
Patent History
Patent number: D422071
Type: Grant
Filed: Mar 19, 1998
Date of Patent: Mar 28, 2000
Assignee: Donaldson Company, Inc. (Minneapolis, MN)
Inventors: Thomas G. Miller (Eagan, MN), Dolan D. Bartels (Delphi, IN), Andrew L. Albitz (Mulburry, IN), Bruce R. Crenshaw (Frankfort, IN)
Primary Examiner: Lisa Lichtenstein
Law Firm: Merchant & Gould P.C.
Application Number: 0/85,279
Type: Grant
Filed: Mar 19, 1998
Date of Patent: Mar 28, 2000
Assignee: Donaldson Company, Inc. (Minneapolis, MN)
Inventors: Thomas G. Miller (Eagan, MN), Dolan D. Bartels (Delphi, IN), Andrew L. Albitz (Mulburry, IN), Bruce R. Crenshaw (Frankfort, IN)
Primary Examiner: Lisa Lichtenstein
Law Firm: Merchant & Gould P.C.
Application Number: 0/85,279
Classifications
