Celanese Sues Chinese Sweetener Competitors in Europe for Patent Infringement, Seeks Additional U.S. Patent Rights


Celanese Corporation (NYSE: CE), a global technology and specialty
materials company, today announced that it has filed a patent
infringement lawsuit in Europe against three Chinese manufacturers of
high-potency sweeteners, specifically Acesulfame Potassium (Ace-K). The
complaints allege that Suzhou Hope Technology Co., Ltd., Anhui Jinhe
Industrial Co., Ltd., and Vitasweet Co., Ltd., are infringing newly
granted European Patent No. 2 861 569 by continuing to unlawfully import
infringing Ace-K sweetener into Europe. The ’569 patent is directed to
improved production processes for making its Sunett® Ace-K sweetener.

In a temporary shift in focus, Celanese has withdrawn its complaint from
the U.S. International Trade Commission (ITC) and requested the U.S.
Patent and Trademark Office review additional claims to its
already-patented and improved Ace-K manufacturing process described in
U.S. Patent No. 9,024,016.

Celanese continues to invest in manufacturing and quality improvements
and is dedicated to robust research, development and customer support
for the Sunett® sweetener products manufactured by its patented
processes. The company will protect these investments to supply
customers with quality engineered products, and will vigorously defend
its patented technology against unlawful importation and uses in the
United States, Europe, China and globally.

About Celanese

Celanese Corporation is a global technology leader in the production
of differentiated chemistry solutions and specialty materials used in
most major industries and consumer applications. Our two complementary
business cores, Acetyl Chain and Materials Solutions, use the full
breadth of Celanese’s global chemistry, technology and business
expertise to create value for our customers and the corporation. As we
partner with our customers to solve their most critical business needs,
we strive to make a positive impact on our communities and the world
through The Celanese Foundation. Based in Dallas, Celanese employs
approximately 7,000 employees worldwide and had 2015 net sales of $5.7
billion. For more information about Celanese and our product offerings,
or our blog at

All registered trademarks are owned by Celanese International
Corporation or its affiliates.

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Celanese Corporation
Investor Relations
Varshney, +1 972-443-3078
Relations – Global

W. Travis Jacobsen, +1 972-443-3750
Relations Asia (Shanghai)

Helen Zhang, +86 21 3861 9279
Relations Europe (Germany)

Jens Kurth, +49(0)69 45009 1574

Source: Celanese Corporation