Directa Plus, a producer and supplier of graphene-based products for use in consumer and industrial markets,says Ufficio Brevetti e Marchi (Italian Patent and Trademark Office) has issued notification that a further two patents have been granted covering Directa Plus's proprietary G+ manufacturing process.
The company now has a portfolio of 14 patents granted and eight pending. Patent MI2014A001123: Process for preparing graphene nanoplatelets (GNPs) This patent covers the core of Directa Plus's G+ technology, the liquid exfoliation phase, where the company's material passes from a 3D to 2D state. Patent MI2014A001124L: Continuous process for preparing pristine GNPs This patent covers the entire production process of G+ pristine GNPs, which comprises natural graphite expansion, exfoliation and drying to obtain different grades and physical forms of G+ materials. The patent is focused on the continuous character of the process while maintaining its inherent flexibility for the production of customised graphene-based products.
The whole production process does not involve the use of any type of chemistry nor oxidation steps, therefore providing pure materials already certified as non-toxic for human health.