Zentek Files Provisional Patent Application for Absorption-Based EMI Shielding Coating Made from Albany Graphite
Zentek’s patented graphite coating expands high-purity use cases for electromagnetic interference shielding applications.
Zentek Ltd. (ZEN) filed a provisional patent application with the USPTO for ZEN-EMI-01, a water-based electromagnetic interference (EMI) shielding coating derived from purified graphite sourced from its Albany deposit. The coating utilizes an absorption-based mechanism that converts electromagnetic energy into heat, rather than relying on reflection, and is designed for use in densely packed electronic systems as well as defense and aerospace applications.
Internal laboratory testing conducted at the company’s Guelph facility demonstrated a significant reduction of 8-12 GHz microwave frequencies with low reflection levels of less than 5 dB. These results have not yet been independently verified. The provisional filing establishes a priority date, initiating a 12-month window to file international applications. Future steps require third-party verification, formulation optimization, and scale-up testing. No customer agreements or commercial assurances currently exist.
Zentek Ltd. (ZEN) filed a logical, incremental extension of the Albany Graphite Project's high-purity positioning, directly aligning with the August 10 Preliminary Economic Assessment (PEA) that highlighted nuclear, defense, and strategic supply chain applications. The filing does not alter the core economic thesis, capital requirements of $817M in initial capex, or the development timeline outlined in the PEA.
The technology remains at the laboratory stage with no verified commercial pathway or revenue contribution. The news is in line with previously disclosed strategic goals to diversify high-value graphite applications.
Zentek Ltd. operates across three distinct platforms: Albany Graphite, which produces ultra-high-purity graphite for nuclear, defense, and battery markets; ZenGUARD, a graphene-based air filtration media; and Triera Biosciences, focused on aptamer-based diagnostics and therapeutics. The company’s flagship Albany Graphite Project in Ontario targets an annual production of 30,000 tonnes of graphite with 99.9992% purity, utilizing an acid-free thermal purification process. Zentek is currently transitioning from low-margin product sales to an intellectual property licensing and contract research organization model, emphasizing capital discipline and milestone-driven development.