With the analysis among 120 patents, we discovered top 24 key players by total patent application. Ruhrchemie AG, Hoechst AG, Huls are dominant in this area. They take 37.50% of the total patent filing.
Hessen, Germany
Patent: 16
Delaware, United States
Patent: 5
Air Products & Chemicals, Inc.
Pennsylvania, United States
Patent: 2
New York, United States
Patent: 2
SK Petrochemical Co., Ltd.
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