Agreement with leading gas supplier supports scalable production of pristine graphene using high-purity acetylene feedstockTORONTO, April 30, 2025 (GLOBE NEWSWIRE) -- HydroGraph Clean Power Inc. (CSE: HG) (OTCQB: HGRAF) (FRA: M98) (“HydroGraph” or the “Company”), a sustainable commercial manufacturer of pristine graphene, today announced two major growth milestones: a strategic relationship with a leading North American industrial gas supplier and the initiation of the first stages of planning for a new pro ...