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Carbon has successfully defended a key European patent covering its dual-cure 3D printing technology after a multi-year challenge from a competitor.
The California-based additive manufacturing company announced on September 28 that the European Patent Office (EPO) Board of Appeal had upheld European Patent No. 3158400, which covers methods for producing 3D printed objects using materials with multiple hardening mechanisms. The technology is important to Carbon because it helps turn light-cured printed parts into stronger, more durable products for end-use applications.
According to Carbon, the EPO upheld the patent’s broadest claim and restored additional dependent claims that had previously been removed.
“This decision confirms the strength and validity of Carbon’s foundational dual-cu