For the Inventor, By the Inventor

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Charlotte, NC, United States of America

Midrex Corporation

USPTO Granted Patents = 50

Trademarks = 4

Forward Citations = 504

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21 inventors (with patents filed for the assignee):

Donald Beggs (21 out of 21 patents)

John C Scarlett (15 out of 17 patents)

Charles W Sanzenbacher (13 out of 19 patents)

4. David C Meissner (10 out of 34 patents)

5. Wolfgang B Pietsch (6 out of 6 patents)

6. Robert M Escott (6 out of 6 patents)

7. William A Ahrendt (5 out of 5 patents)

8. Bruce G Kelley (3 out of 3 patents)

9. Donald W Clark (2 out of 5 patents)

10. Allan C Huestis (2 out of 4 patents)

11. Charles M Jaco, Jr (2 out of 2 patents)

12. Winston L Tennies (1 out of 3 patents)

13. Wallace C Menear (1 out of 1 patent)

14. Charles A Schroer (1 out of 1 patent)

15. Gilbert Y Whitten, Jr (1 out of 2 patents)

Core Competencies:

Selective Reduction

Metallic Oxides

Direct Reduction

Iron Production

Shaft Furnace

Coke Oven Gas

Fluid Bed Gasification

Submerged Combustion

Passivation of Sponge Iron

Metallized Iron Briquet

Iron Powder Production

Heat Exchanger

50 patents: Sort by Forward Citations

1. 4470581 - Apparatus for selective reduction of metallic oxides (1984-09-11),

2. 4462526 - Continuous briquet sheet separator (1984-07-31),

3. 4439233 - Direct reduction of iron (1984-03-27),

4. 4381939 - Method for selective reduction of metallic oxides (1983-05-03),

5. 4365789 - Apparatus for the direct reduction of iron in a shaft furnace using gas (1982-12-28),

6. 4358310 - Dry collection of metallized fines (1982-11-09),

7. 4351513 - Direct reduction of iron using coke oven gas (1982-09-28),

8. 4333761 - Method for direct reduction of iron using high sulfur gas (1982-06-08),

9. 4331470 - Method for the direct reduction of iron in a shaft furnace using gas (1982-05-25),

10. 4316739 - Method for producing molten iron (1982-02-23),

11. 4306903 - Method for reducing particulate iron oxide to molten iron with solid (1981-12-22),

12. 4286775 - Apparatus for producing molten iron from iron oxide with coal and oxygen (1981-09-01),

13. 4270740 - Apparatus for producing molten iron by submerged combustion (1981-06-02),

14. 4270739 - Apparatus for direct reduction of iron using high sulfur gas (1981-06-02),

15. 4260412 - Method of producing direct reduced iron with fluid bed coal gasification (1981-04-07),

Midrex Corporation is a leading global provider of direct reduction ironmaking technology, including the MIDREX® Process. With over 50 years of experience, Midrex has built a solid reputation in the iron and steel industry by consistently delivering reliable, innovative, and environmentally-friendly solutions. Our patented direct reduction technology enables the production of high-quality direct reduced iron (DRI) while minimizing environmental impact and reducing energy consumption. Midrex remains committed to driving advancements in ironmaking through continuous research, development, and collaboration with our partners worldwide.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

50 Patents

#33 in Charlotte, NC

#158 in North Carolina

#6,764 in US

#13,575 in the World

Charlotte, NC, United States of America

Midrex Corporation

Forward Citations = 504

21 inventors:

Donald Beggs (21 out of 21 patents)

John C Scarlett (15 out of 17 patents)

Charles W Sanzenbacher (13 out of 19 patents)

4. David C Meissner (10 out of 34 patents)

5. Wolfgang B Pietsch (6 out of 6 patents)

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