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 side elevational view;

FIG. 3 is an opposite side elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D283649 April 29, 1986 Casberg
D285729 September 16, 1986 Tovey
D304244 October 24, 1989 Tovey
683181 September 1901 Mereness
692481 February 1902 Robinson
1267949 May 1918 Williams
3925225 December 1975 Morrison
4569780 February 11, 1986 Fernholz et al.
4683072 July 28, 1987 Holdt et al.
4835804 June 6, 1989 Arnau-Munoz et al.
4942973 July 24, 1990 Bowie
4944165 July 31, 1990 Leebeek et al.
4996000 February 26, 1991 Redeker
5122158 June 16, 1992 Kuroda et al.
5133892 July 28, 1992 Chun et al.
Foreign Patent Documents
0245760 June 1987 EPX
Patent History
Patent number: D335699
Type: Grant
Filed: May 14, 1991
Date of Patent: May 18, 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: 7/699,789