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Houston, TX, United States of America

Quanex Corporation

USPTO Granted Patents = 31

% Expired Patents = 32.3

Trademarks = 5

Forward Citations = 562

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33 inventors (with patents filed for the assignee):

James W Meeks (13 out of 21 patents)

Brian S Hewitt (6 out of 8 patents)

Brian D Jensen (6 out of 44 patents)

4. Joseph D Isaacs (5 out of 7 patents)

5. Michael E Pepper (5 out of 5 patents)

6. Ronald J Pich (4 out of 4 patents)

7. Jeffrey V Sawyers (4 out of 5 patents)

8. Robert C Martineau (3 out of 7 patents)

9. David C Bryant (3 out of 13 patents)

10. Scott M Fetting (3 out of 3 patents)

11. Robert E Daniels, Jr (3 out of 3 patents)

12. Jacob D Pichler (2 out of 2 patents)

13. Peter A Gunther (2 out of 2 patents)

14. Charles Joseph Librande (2 out of 2 patents)

15. John Paul Von Arx (2 out of 2 patents)

Core Competencies:

Frame Assembly

Cornerlock

Threshold Assembly

Retention Assembly

Entryway System

Adjustable Frame

Sliding Rail

Astragal Boot

Window Component

Muntin Bar

Adjustable Roller

Tubular Connection

31 patents: Sort by Forward Citations

1. 9879472 - Frame assembly including a cornerlock (2018-01-30),

2. 9869122 - Cornerlock having a self configurable first body member (2018-01-16),

3. 9487992 - Threshold assembly for an entryway system (2016-11-08),

4. 8813427 - Threshold assembly having a rail and a drainage element (2014-08-26),

5. 8683771 - Adjustable frame assembly and method of assembling the adjustable frame assembly (2014-04-01),

6. 8555551 - Corner pad for a door assembly (2013-10-15),

7. 8528212 - Method of manufacturing a frame assembly having stile and rail tabs for coupling stile and rail members together (2013-09-10),

8. 8499523 - Frame assembly having stile and rail tabs for coupling stile and rail members together (2013-08-06),

9. 8291656 - Retention assembly for retaining a panel in a window or a door (2012-10-23),

10. 7878559 - Lock block assembly for an astragal (2011-02-01),

11. 7877940 - Entryway for disposition in a door opening of a building (2011-02-01),

12. 7861761 - Retractable screen and frame assembly (2011-01-04),

13. 7788863 - Astragal boot (2010-09-07),

14. 7752816 - Retention assembly for retaining a panel in a window or a door (2010-07-13),

15. 7694471 - Astragal boot (2010-04-13),

Company Overview

Quanex Corporation is a leading manufacturer specializing in engineered materials and components for the building and construction industries. The company focuses on developing innovative solutions that enhance energy efficiency and sustainability in residential and commercial applications. With a strong emphasis on research and technology, Quanex leverages advanced manufacturing processes to deliver high-performance products, including window and door systems, as well as other building materials, primarily serving markets across North America.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

31 Patents

#165 in Houston, TX

#599 in Texas

#10,927 in US

#21,260 in the World

Houston, TX, United States of America

Quanex Corporation

Forward Citations = 562

33 inventors:

James W Meeks (13 out of 21 patents)

Brian S Hewitt (6 out of 8 patents)

Brian D Jensen (6 out of 44 patents)

4. Joseph D Isaacs (5 out of 7 patents)

5. Michael E Pepper (5 out of 5 patents)

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

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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