Patent
   D519601
Priority
Sep 17 2004
Filed
Sep 17 2004
Issued
Apr 25 2006
Expiry
Apr 25 2020
Assg.orig
Entity
unknown
12
12
n/a
The ornamental design for an underdrain, as shown and described.

FIG. 1 is a plan view of my underdrain;

FIG. 2 is a bottom view of the apparatus depicted in FIG. 1.

FIG. 3 is a front elevation view of the apparatus depicted in FIG. 1.

FIG. 4 is a rear elevation view of the apparatus depicted in FIG. 1.

FIG. 5 is a right side view of the apparatus depicted in FIG. 1; and,

FIG. 6 is a left side view of the apparatus depicted in FIG. 1.

Addison, Mark Kevin

Patent Priority Assignee Title
D612022, Dec 18 2008 Reln Pty Ltd Shallow drainage channel
D658275, May 26 2011 Reln Pty Ltd Drainage channel
D662190, May 13 2011 Reln Pty Ltd Shallow drainage channel
D662191, May 13 2011 Reln Pty Ltd Drainage channel
D672015, Jun 04 2010 Reln Pty Ltd Drainage grate frame
D673250, May 13 2011 Reln Pty Ltd Drainage pit
D682400, May 26 2011 Reln Pty Ltd Drainage pit
D684597, Dec 23 2011 ITT WATER & WASTEWATER LEOPOLD, INC Granular filter media retainer
D687861, Jan 17 2012 Xylem Water Solutions Zelienople, LLC Filter media retainer
D772382, May 21 2015 Drainage fitting for a retaining wall
D912764, Jul 04 2018 ADEY HOLDINGS (2008) LIMITED Filter
ER4765,
Patent Priority Assignee Title
3840117,
3956134, Jul 19 1973 Hi-Ran, Ltd. Underdrain for water filtration system
5068034, May 03 1990 Unilift Corporation Purification underdrain with means to compensate for flow and pressure differences between laterals
5108627, Feb 01 1991 F.B. Leopold Company, Inc.; F B LEOPOLD COMPANY, INC , A DE CORP Filter underdrain block
5149427, Apr 03 1991 The F.B. Leopold Company, Inc. Cap for underdrains in gravity filters
5160614, Feb 25 1992 ITT WATER & WASTEWATER LEOPOLD, INC Air duct block for air/water underdrain systems in gravity filters
5296138, May 03 1990 Unifilt Corporation Underdrain for liquid purification systems
5328608, May 27 1992 Xylem Water Solutions Zelienople, LLC Mutli-lateral filter underdrain block
5462664, Aug 05 1992 Filter underdrain module and underdrain system
5489388, Apr 12 1994 Xylem Water Solutions Zelienople, LLC Apparatus and method for improving gas backwash in lateral underdrains
5639384, Apr 12 1994 Xylem Water Solutions Zelienople, LLC Apparatus and method for improving gas backwash in lateral underdrains
6143188, Dec 22 1998 SEVERN TRENT WATER PURIFICATION, INC Underdrain block for filter media system
//
Executed onAssignorAssigneeConveyanceFrameReelDoc
Sep 09 2002ADDISON, MARK KEVINRG DELAWARE, INC ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0158090867 pdf
Sep 17 2004RG Delaware, Inc.(assignment on the face of the patent)
n/a
Date Maintenance Fee Events


n/a
Date Maintenance Schedule