Patent
   D489739
Priority
Dec 20 2002
Filed
Jun 20 2003
Issued
May 11 2004
Expiry
May 11 2018
Assg.orig
Entity
unknown
8
10
n/a
The ornamental design for a electrostatic chuck, as shown and described.

FIG. 1 is a perspective view of the top, front and right side of an electrostatic chuck showing my new design;

FIG. 2 is a front elevational view thereof, the rear elevational view being a mirror image thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a sectional view taking along the line 7--7 in FIG. 5.

Okugawa, Keisuke

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Patent Priority Assignee Title
5535090, Mar 03 1994 Electrostatic chuck
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Jun 20 2003NGK Spark Plug Co., Ltd.(assignment on the face of the patent)
Jul 01 2003OKUGAWA, KEISUKENGK SPARK PLUG CO , LTD ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0145080206 pdf
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