Brimstone Energy Patents

Patent portfolio assigned to Brimstone Energy (verified via public assignee records). Estimated patent count: 6. Oakland, California climate-tech making decarbonized Portland cement from calcium-silicate rock (founded Caltech, Cody Finke/Hugo Leandri). Patents confirmed via Google Patents/Justia (e.g. US20210070656A1, WO2021030529A1; 'Process to make calcium oxide or ordinary Portland cement from calcium-bearing rocks'); assignees Brimstone Energy Inc. / Caltech; CBInsights cites ~6 filings (count approximate). Competitors are other low-carbon-cement startups (Sublime, Fortera, etc.) per DC2 alliance / press. No named paying cement customers disclosed publicly yet.