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Pittsburgh, PA, United States of America

National Steel Corporation

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USPTO Granted Patents = 134

Trademarks = 1

Forward Citations = 1,743

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147 inventors (with patents filed for the assignee):

William T Saunders (23 out of 62 patents)

Lowell W Austin (11 out of 14 patents)

John R Smith (6 out of 6 patents)

4. Kent W Loest (5 out of 5 patents)

5. David A Chatfield (4 out of 4 patents)

6. William D Bingle (4 out of 4 patents)

7. Christopher C Jakimowicz (3 out of 3 patents)

8. Walter A Wilson (3 out of 6 patents)

9. Vernon R Ewing (3 out of 3 patents)

10. Gordon L Peters (3 out of 3 patents)

11. Winfield M Hass (3 out of 3 patents)

12. Howard E Niehaus (3 out of 3 patents)

13. Carmen C Manzonelli (3 out of 3 patents)

14. Charles M Benton (3 out of 7 patents)

15. Judson W Martt (3 out of 3 patents)

Core Competencies:

Tundish Fluxing

Hot Dip Coating

Low Loss Motor Lamination

Continuous Casting

Electroplating

Steel Sheet Production

Coke Oven Emission Control

Metal Strip Annealing

Reinforcing Sheet Material

Seam-Free Can Body

High Tensile Steel

Temperature Control

134 patents: Sort by Forward Citations

1. 6516870 - Tundish fluxing process (2003-02-11),

2. 6143100 - Bake-hardenable cold rolled steel sheet and method of producing same (2000-11-07),

3. 6007642 - Super low loss motor lamination steel (1999-12-28),

4. 5645121 - Method of continuous casting using sealed tundish and improved tundish (1997-07-08),

5. 5600564 - Coke oven battery with communication system (1997-02-04),

6. 5571328 - Bearing support for submerged rolls in hot dip coating operation (1996-11-05),

7. 5544868 - Blow pipe and gas lance for blast furance (1996-08-13),

8. 5485387 - Method and apparatus for performing cup earing test (1996-01-16),

9. 5174822 - Steel strip annealing and coating apparatus (1992-12-29),

10. 5099780 - Bearing support for hot dip metal coating roll (1992-03-31),

11. 5078089 - Oil spray coating booth (1992-01-07),

12. 5007318 - Metal strip edge trimming apparatus (1991-04-16),

13. 4959939 - Building panel mounting system (1990-10-02),

14. 4945746 - Containment fence for runout table (1990-08-07),

15. 4886247 - Ceramic brick retainer band for steel ladle (1989-12-12),

Company Overview

National Steel Corporation, headquartered in Pittsburgh, PA, specializes in advanced steel manufacturing technologies. The company is recognized for its expertise in tundish fluxing, hot dip coating, and low loss motor lamination, contributing to the production of high-quality steel sheets. Additionally, National Steel focuses on continuous casting, electroplating, and innovative solutions for coke oven emission control and metal strip annealing, positioning itself as a leader in the steel industry with a commitment to sustainability and efficiency.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

134 Patents

#28 in Pittsburgh, PA

#120 in Pennsylvania

#2,897 in US

#6,022 in the World

Pittsburgh, PA, United States of America

National Steel Corporation

Forward Citations = 1,743

147 inventors:

William T Saunders (23 out of 62 patents)

Lowell W Austin (11 out of 14 patents)

John R Smith (6 out of 6 patents)

4. Kent W Loest (5 out of 5 patents)

5. David A Chatfield (4 out of 4 patents)

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