[GRAPHIC OMITTED]
PPG Industries PPG Industries, Inc.
One PPG Place
Pittsburgh, Pennsylvania 15272 USA
Telephone (412) 434-2342
Fax (412) 434-3700
fheinemann@ppg.com
Frank W. Heinemann
Director Manufacturing & Applied
Technology, Optical Products
April 11, 2003
Ms. Janice K. Mahon
Vice President of Technology Commercialization
Universal Display Corporation
375 Phillips Boulevard
Ewing, NJ 08618
RE: UDC - PPG Development and License Agreement (October 1, 2000) -
Third Amendment
Dear Janice:
At the request of Universal Display Corporation (UDC), PPG is willing to add
[The confidential material contained herein has been omitted and has been
separately filed with the Commission.] additional [The confidential material
contained herein has been omitted and has been separately filed with the
Commission.] materials [The confidential material contained herein has been
omitted and has been separately filed with the Commission.] to the list of [The
confidential material contained herein has been omitted and has been separately
filed with the Commission.] Chemicals manufactured by PPG and supplied to UDC
under the above subject Agreement. Attachment A is hereby amended to include the
listing of these materials (copy attached).
Upon acceptance by UDC, please sign both originals retaining one for your files
and returning the other to my attention.
Best regards,
Frank W. Heinemann
- --------------------------------------------
Frank W. Heinemann
ACKNOWLEDGED AND AGREED TO:
Universal Display Corporation.
By: Janice K. Mahon
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Print Name: Janice K. Mahon
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Title: V.P. of Technology Commercialization
ATTACHMENT A
[The confidential material contained herein has been omitted and has been
separately filed with the Commission.]