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Canadian Solar Wins U.S. Patent Board Ruling Against Maxeon Solar Technologies
The U.S. Patent Trial and Appeal Board invalidated all Maxeon claims against Canadian Solar regarding TOPCon solar-cell technology, leading to a 5.2% rise in Canadian Solar shares.
- On Jan. 15, 2026, Canadian Solar Inc. , Kitchener, announced a decisive victory as the U.S. Patent Trial and Appeal Board held all claims Maxeon Solar Pte. asserted invalid.
- In 2024, Maxeon Solar Pte., Singapore-based, filed a patent infringement lawsuit over Canadian Solar's TOPCon solar‑cell technology and said it will continue defending its intellectual property rights.
- Canadian Solar's sustained R&D underpins its R&D and intellectual‑property portfolio, with Canadian Solar Inc. filing more than 5,000 patent applications and securing more than 4,000 granted patents.
- Market reaction followed the PTAB decisions as U.S.-listed Canadian Solar shares rose 5.2% while Maxeon Solar Technologies shares fell 2.3%, and a Maxeon spokesperson said it is evaluating the ruling and options to appeal, noting the USPTO upheld one TOPCon claim.
- With nearly 170 GW delivered, Canadian Solar Inc. said the victory reflects fairness of the international intellectual property protection framework and its global scale with over 16 GWh shipped through e-STORAGE.
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U.S. Patent Trial and Appeal Board Invalidates Maxeon Patents in Favor of Canadian Solar
/PRNewswire/ -- Canadian Solar Inc. (NASDAQ: CSIQ) (the "Company", or "Canadian Solar") today announced a decisive victory in litigation proceedings against...
·United States
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US patent office rules two Maxeon TOPCon patent claims as 'unpatentable'
After a nearly two-year ordeal, some answers have been determined in the TOPCon intellectual patent lawsuit between Maxeon and Canadian Solar. In March 2024, Maxeon alleged Canadian Solar had infringed on three patents related to TOPCon solar panel manufacturing: Patent Nos. 8,222,516 (the ’516 patent), 8,878,053 (the ’053 patent), and 11,251,315 (the ’315 patent). ‘516… The post US patent office rules two Maxeon TOPCon patent claims as ‘unpaten…
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