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USPTO Patent Rankings Data through Dec 31, 2025
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Chee Jian CHAN — 1 Patent

Overall (All Time): N/A of 4,157,543
1 Patents All Time
Chee Jian CHAN has been granted 1 US patent. All of these patents were granted in 2025.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
12503429 Process for manufacturing alkanesulfonic acids Frank PIEPENBREIER, Andreas Kempter, Rosario MAZARRO BERDONCES, Kerstin Schierle-Arndt, Björn Kaibel +5 more 2025-12-23