Patent assignee · US · COMPANY

Midrex Technologies, Inc.

45Patents
40Active
45Granted
51Portfolio score

Filing activity: Oct 29, 1999 → Jun 23, 2023 · 3 expiring within 5 years

Most-cited patents

PatentTitleAreaCited byStatus
US6524356B2 Method and apparatus for producing reformed gases Emerging Cross-Sectional Technologies 48 Expired
US8685136B2 System and method for reducing iron oxide to metallic iron using coke oven gas and oxygen steelmaking furnace gas Emerging Cross-Sectional Technologies 25 Active
US6802886B2 Method of producing a metallized briquette Emerging Cross-Sectional Technologies 15 Expired
US7678176B2 Method and apparatus for charging hot direct reduced iron from hot transport vessels into a melter or finisher Emerging Cross-Sectional Technologies 11 Active
US6251156A Method of producing molten iron in duplex furnaces Emerging Cross-Sectional Technologies 11 Expired
US8496730B2 System and method for reducing iron oxide to metallic iron using coke oven gas and oxygen steelmaking furnace gas Emerging Cross-Sectional Technologies 8 Active
US6506230B2 Method for increasing productivity of direct reduction process Emerging Cross-Sectional Technologies 4 Expired
US6602322B2 High temperature metal recovery process Emerging Cross-Sectional Technologies 4 Expired
US10065857B2 Systems and methods for generating carbon dioxide for use as a reforming oxidant in making syngas or reformed gas Emerging Cross-Sectional Technologies 3 Active
US8377417B2 Method and apparatus for sequestering carbon dioxide from a spent gas Emerging Cross-Sectional Technologies 3 Active
US9127326B2 System and method for reducing iron oxide to metallic iron using natural gas Emerging Cross-Sectional Technologies 2 Active
US9868999B2 Methods and systems for producing direct reduced iron utilizing a petroleum refinery bottoms or petroleum coke gasifier and a hot gas cleaner Emerging Cross-Sectional Technologies 2 Active
US10508314B2 Methods and systems for increasing the carbon content of sponge iron in a reduction furnace Emerging Cross-Sectional Technologies 2 Active
US7938882B2 Method and system for the supply of hot direct reduced iron for multiple uses Emerging Cross-Sectional Technologies 2 Active
US8771638B2 Method and apparatus for sequestering carbon dioxide from a spent gas Emerging Cross-Sectional Technologies 1 Active
US10370732B2 Methods for mitigating the buildup of direct reduced iron clusters on the walls of a direct reduction furnace Emerging Cross-Sectional Technologies 1 Active
US9039794B2 Reformer tube apparatus having variable wall thickness and associated method of manufacture Emerging Cross-Sectional Technologies 1 Active
US10907224B2 Direct reduction system and process utilizing a process gas direct recycle line Emerging Cross-Sectional Technologies 0 Active
US11952638B2 Direct reduction process utilizing hydrogen Emerging Cross-Sectional Technologies 0 Active
US9534265B2 Methods and systems for producing direct reduced iron incorporating a carbon dioxide and steam reformer fed by recovered carbon dioxide Emerging Cross-Sectional Technologies 0 Active
US9534275B2 Methods and systems for reducing chromium containing raw material Chemistry; Metallurgy 0 Active
US11920204B2 Oxygen injection for reformer feed gas for direct reduction process Emerging Cross-Sectional Technologies 0 Active
US12098436B2 Seal gas optimization systems and methods for a direct reduction process Emerging Cross-Sectional Technologies 0 Active
US8871000B2 Electric furnace for producing molten metal having material recycling capability Emerging Cross-Sectional Technologies 0 Active
US9938594B2 Methods and systems for producing direct reduced iron and steel mill fuel gas using coke oven gas and basic oxygen furnace gas Emerging Cross-Sectional Technologies 0 Active

Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.