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Cambrios Defeats C3Nano in China’s IP Court

Friday, June 5, 2020

Cambrios Film Solutions successfully invalidated two patents of C3Nano related to fusing technology and silver nanowire transparent conductive films.

In the trial, Cambrios provided compelling evidence and testimony, and ultimately convinced China’s National Intellectual Property Administration (CNIPA) to invalidate two patents from C3Nano: CN’555 (Chinese Patent No. CN105102555B) and CN’577 (Chinese Patent No. CN104685577B).

For CN’ 555, the patent claims related to transparent conductive films (TCF) have been completely invalidated.

Although C3Nano claimed that “fusing technology” was created on their own, and their processes held unique advantages, CNIPA denied their claims. CNIPA believed that the “fusing technology” was similar to previously-existent “electrically-bridged nanowire” technology, and thus “fusing technology” was neither a unique, nor an original technology at all. As a consequence, the patent claims related to TCF by “fusing technology” have been invalidated in CN’555. Although claims related to ink are reserved, the ruling limits C3Nano’s abilities to comprehensively protect its product rights.

For CN’577, the patent claims related to transparent conductive films (TCF) have been invalidated since they did not meet the basic requirements of the patent act.

According to CNIPA, C3Nano listed eleven TCF samples, but only six samples had a haze of less than 0.5% which was claimed in the patent. In other words, five samples did not meet the specification defined in the patent claims. CINPA concluded, therefore, that C3Nano had not met the basic requirements of the patent act and they could not produce TCFs with same properties via manufacturing processes. Therefore, the patent claims of CN’577 related to silver nanowire-based TCF have been invalidated.

C3Nano did not earn China’s IP court recognition for CN’555 and CN’577, and puts into question their legitimacy to protect their customers in the TCF supply chain. In its ruling, China’s IP court also pointed out that C3Nano could not provide the same quality of TCF by manufacturing processes. In other words, C3Nano might not have the capability to repeatedly achieve their own products’ performance by “fusing technology”. Furthermore, a brief reading of the company’s website suggests that if C3Nano’s “fusing technology” was related to NanoGlue@ and extended TCF film products, such as Activegrid TM Film, it perhaps constitutes a risk to their core products and customers’ business.

Cambrios holds the strongest SNW patent portfolio in the world (80 patents in China/ 217 patents globally). Cambrios’ continued breakthroughs in silver nanowire-based transparent electrodes simplify electronics manufacturing processes and improve end-product performance for current, and future, next-generation consumer devices.