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Middletown, OH, United States of America

Armco Steel Corporation

USPTO Granted Patents = 80

Trademarks = 9

Forward Citations = 918

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90 inventors (with patents filed for the assignee):

Marvin B Pierson (11 out of 14 patents)

Thomas A Compton (6 out of 8 patents)

James D Evans (5 out of 6 patents)

4. Harry Tanczyn (5 out of 10 patents)

5. Hart F Graff (5 out of 7 patents)

6. Paul E Schnedler (4 out of 4 patents)

7. John M Maxel (3 out of 6 patents)

8. Rollin E Hook (3 out of 6 patents)

9. Frank C Dunbar (3 out of 9 patents)

10. Jerry L Arnold (3 out of 5 patents)

11. William R Leasure (3 out of 3 patents)

12. Alan F Gibson (2 out of 12 patents)

13. Donald H Ward (2 out of 3 patents)

14. Charles Flinchum (2 out of 8 patents)

15. John A Thornton (2 out of 12 patents)

Core Competencies:

Metal Coating

Aluminum Coatings

Austenitic Stainless Steel

Surface Treatments

Electrostatic Coating

Cold Rolled Steel

Heat Hardening

Filtration Systems

Pipe Couplings

Refractories

Annealing Processes

Sludge Removal

80 patents: Sort by Forward Citations

1. 4190534 - Waste water filtration and sludge removal system (1980-02-26),

2. 4176865 - Coupling for pipe (1979-12-04),

3. 4173139 - Ultrasonic reference standard and the methods of construction and use (1979-11-06),

4. 4169734 - Chemically bonded magnesia-chrome refractories (1979-10-02),

5. 4165882 - Sealing means for slide gate (1979-08-28),

6. 4155235 - Production of heavy pure aluminum coatings on small diameter tubing (1979-05-22),

7. 4153006 - Apparatus for finishing molten metallic coatings (1979-05-08),

8. 4152471 - Method for continuously contact-coating one side only of a ferrous base (1979-05-01),

9. 4148946 - Method for maintaining a non-oxidizing atmosphere at positive pressure (1979-04-10),

10. 4147383 - Pipe coupling (1979-04-03),

11. 4146412 - Galling resistant austenitic stainless steel (1979-03-27),

12. 4146209 - Gate valve (1979-03-27),

13. 4143498 - Concealed fastener clip for building panels (1979-03-13),

14. 4140552 - Method of treating aluminum-killed and low alloy steel strip and sheet (1979-02-20),

15. 4137347 - Metallic coating method (1979-01-30),

Company Overview

Armco Steel Corporation, headquartered in Middletown, Ohio, specializes in advanced metal coating technologies. The company focuses on the development and manufacturing of various metal coatings, including aluminum coatings and surface treatments for a range of applications. With expertise in austenitic stainless steel and cold rolled steel, Armco also innovates in heat hardening and electrostatic coating processes. Their commitment to quality and innovation positions them as a key player in the metal coating industry.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

80 Patents

#3 in Middletown, OH

#213 in Ohio

#4,632 in US

#9,454 in the World

Middletown, OH, United States of America

Armco Steel Corporation

Forward Citations = 918

90 inventors:

Marvin B Pierson (11 out of 14 patents)

Thomas A Compton (6 out of 8 patents)

James D Evans (5 out of 6 patents)

4. Harry Tanczyn (5 out of 10 patents)

5. Hart F Graff (5 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Armco Steel Corporation. Retrieved from https://idiyas.com/company/armco-steel

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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