Filter sheet

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Description

FIG. 1 is a top plan view of a filter sheet showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a side elevational view thereof, the opposite side being identical;

FIG. 4 is a front elevational view thereof, the rear being identical; and,

FIG. 5 is a front elevational view thereof, on an enlarged scale, partially shown for clarity and ease of illustration.

Referenced Cited
U.S. Patent Documents
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Foreign Patent Documents
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Other references
  • Prostak.TM. Bench Top Development System Lit No. SD200, 8/88. "Toyo Soda Ultrafiltration Cassette UF-LABO", undated. "Laboratory Ultrafiltration Products for Improved Biological Recovery", Lit. No. AB841, 10/88. "Shorten the Race to the Market with Millipore Pilot and Process Systems", Lit. No. SD100, 1/88.
Patent History
Patent number: D325070
Type: Grant
Filed: Jun 9, 1989
Date of Patent: Mar 31, 1992
Inventor: Henry B. Kopf (Cary, NC)
Primary Examiner: Wallace R. Burke
Assistant Examiner: M. H. Tung
Attorney: Steven J. Hultquist
Application Number: 7/365,022
Classifications
Current U.S. Class: Filter Or Strainer (2) (D23/209)