Filter casing

- Ultrafilter GmbH
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Description

FIG. 1 is a bottom and front perspective view of my design for a filter casing showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a rear elevational view;

FIG. 4 is a right side elevation view thereof; and

FIG. 5 is a bottom plan view.

Referenced Cited
U.S. Patent Documents
D220263 March 1971 Hughes
D221850 September 1971 Anderson
3122501 February 1964 Hultgren
3312351 April 1967 Kasten
3502221 March 1970 Butterfield
Other references
  • Nylon Filter Corp. Brochure, p. 7, Item No. 141.
Patent History
Patent number: D255045
Type: Grant
Filed: Aug 26, 1977
Date of Patent: May 20, 1980
Assignee: Ultrafilter GmbH (Dusseldorf)
Inventor: Dirk G. Kronsbein (Dusseldorf)
Primary Examiner: James R. Largen
Attorney: David Toren
Application Number: 5/828,194
Classifications
Current U.S. Class: D23/4
International Classification: D2301;