Laboratory filter

Description

FIG. 1 is a perspective view of a laboratory filter embodying my new design, the broken lines being for illustration purposes only;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a top plan view thereof; and

FIG. 4 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
90523 May 1869 Goodfellow
181532 August 1876 Melbert
D185115 May 1959 Beerman
D270947 October 11, 1983 Mehra et al.
Patent History
Patent number: D285487
Type: Grant
Filed: Jul 18, 1983
Date of Patent: Sep 2, 1986
Assignee: Trend Scientific, Inc. (Minneapolis, MN)
Inventor: Gerald P. Tjernagel (North Mankato, MN)
Primary Examiner: A. Hugo Word
Assistant Examiner: Stella M. Reid
Law Firm: Kinney & Lange
Application Number: 6/514,623
Classifications
Current U.S. Class: D24/29