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Charlotte, NC, United States of America

Midrex Corporation

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USPTO Granted Patents = 50

Trademarks = 4

Forward Citations = 505

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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:

Direct Reduction

Iron Oxide

Molten Iron

Briquet Production

Metallized Fines

Gasification

Submerged Combustion

Sponge Iron

Particulate Materials

Coal Gas

Iron Powder

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),

Company Overview

Midrex Corporation, headquartered in Charlotte, NC, specializes in innovative iron reduction technology, focusing on the direct reduction of iron oxide. The company is recognized for its advancements in producing high-quality molten iron and sponge iron, utilizing processes such as gasification and submerged combustion. Midrex's expertise extends to briquet production and metallized fines, positioning it as a leader in the iron and steel industry, committed to enhancing efficiency and sustainability in iron production.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

50 Patents

#36 in Charlotte, NC

#170 in North Carolina

#7,012 in US

#14,011 in the World

Charlotte, NC, United States of America

Midrex Corporation

Forward Citations = 505

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)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Midrex Corporation. Retrieved from https://idiyas.com/company/midrex

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

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