With 837 patents published between 2002 and 2022, Halliburton Co holds the most number of patents in the Chemicals sector in United Kingdom, of which 99.4% was contributed by its subsidiary Halliburton Energy Services Inc.
The second largest number of patents were published by Sumitomo Chemical Co Ltd with 817 related patents. The third largest number of patents were published by China National Chemical Corp with 601 related patents, of which 52.2% was contributed by its subsidiary Syngenta Participations AG. The fourth largest number of patents were published by Johnson Matthey Plc with 378 related patents. The fifth largest number of patents were published by Schlumberger Ltd with 269 related patents, of which 83.3% was contributed by its subsidiary Schlumberger Holdings Corp.
The top five patent holders, i.e., Halliburton Co, Sumitomo Chemical Co Ltd, China National Chemical Corp, Johnson Matthey Plc, and Schlumberger Ltd, together held 2,902 patents during the period.
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