Chemical detergent block

- Ecolab Inc.
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Description

FIG. 1 is a perspective view of a chemical block showing our new design;

FIG. 2 is a top plan view thereof, the bottom view being a mirror image of that shown; and,

FIG. 3 is a side elevatinal view thereof, all other sides being mirror images of that shown.

Referenced Cited
U.S. Patent Documents
D137235 February 1944 Butler
D272848 February 28, 1984 Koziol
D283649 April 29, 1986 Casberg
D285729 September 16, 1986 Tovey
D304244 October 24, 1989 Tovey
3925225 December 1975 Morrison
4569780 February 11, 1986 Fernholz et al.
5122158 June 16, 1992 Kuroda et al.
5133892 July 28, 1992 Chun et al.
Patent History
Patent number: D335330
Type: Grant
Filed: May 14, 1991
Date of Patent: May 4, 1993
Assignee: Ecolab Inc. (St. Paul, MN)
Inventors: Elizabeth J. Gladfelter (Falcon Heights, MN), Tina O. Outlaw (Inver Grove Heights, MN), James L. Copeland (Burnsville, MN), Rhonda K. Schulz (Burnsville, MN), Daniel K. Boche (Eagan, MN), Jeff W. Peterson (Minnetonka, MN)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Melody Brown
Law Firm: Merchant, Gould, Smith, Edell, Welter & Schmidt
Application Number: 7/699,788