Inventor · Minneapolis, MN, US

Francis Johnson

25Patents
6h-index
44Co-inventors
69Inventor score

Filing activity: Nov 20, 1978 → Apr 12, 2022

Most-cited inventions

PatentTitleAreaCited byStatus
US9534817B2 Conduction based magneto caloric heat pump Emerging Cross-Sectional Technologies 37 Active
US4235420A Two piece cast ratchet winch Emerging Cross-Sectional Technologies 14 Expired
US9634549B2 Dual phase magnetic material component and method of forming Chemistry; Metallurgy 10 Active
US9803139B1 Process for removing aluminum-silicon coatings from metallic structures, and related processes for preparing magnetic components Electricity 9 Active
US10229777B2 Graded magnetic component and method of forming Chemistry; Metallurgy 6 Active
US10673288B2 Method for forming a nitrogenation barrier and machine formed using a body having the nitrogenation barrier Electricity 6 Active
US10190206B2 Dual phase magnetic material component and method of forming Chemistry; Metallurgy 6 Active
US10229776B2 Multi-phase magnetic component and method of forming Chemistry; Metallurgy 5 Active
US10749385B2 Dual magnetic phase material rings for AC electric machines Electricity 4 Active
US9373433B2 Nanocomposite permanent magnets and methods of making the same Electricity 2 Active
US10931157B2 Unitary structure having magnetic and non-magnetic phases Electricity 2 Active
US7905965B2 Method for making soft magnetic material having fine grain structure Electricity 2 Active
US8313588B2 Amorphous magnetic alloys, associated articles and methods Electricity 2 Active
US11830644B2 Anisotropic iron nitride permanent magnets Chemistry; Metallurgy 0 Active
US10760168B2 Composite nanoparticles comprising a complexing ligand and methods of preparation thereof Electricity 0 Active
US10748687B2 Methods of making a component with variable magnetization and related components Electricity 0 Active
US9251938B2 Soft magnetic phase nanoparticles preparations and associated methods thereof Performing Operations; Transporting 0 Active
US10946444B2 Method of heat-treating additively manufactured ferromagnetic components Emerging Cross-Sectional Technologies 0 Active
US9205484B2 High thermal conductivity shell molds Performing Operations; Transporting 0 Active
US7722779B2 Method and etchant for removing glass-coating from metal wires Chemistry; Metallurgy 0 Active
US12362082B2 Coercivity-enhanced iron nitride nanoparticles with high saturation magnetization Chemistry; Metallurgy 0 Active
US10126025B2 Magneto caloric assemblies Emerging Cross-Sectional Technologies 0 Active
US7771545B2 Amorphous metal alloy having high tensile strength and electrical resistivity Chemistry; Metallurgy 0 Active
US9938628B2 Composite nanoparticles containing rare earth metal and methods of preparation thereof Electricity 0 Active
US11309107B2 Anisotropic iron nitride permanent magnets Chemistry; Metallurgy 0 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.