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For the Inventor, By the Inventor

Moon Township, PA, United States of America

Harbison-Walker Refractories Company

Calculating rank
USPTO Granted Patents = 21

% Expired Patents = 9.5


Trademarks = 4

Forward Citations = 82

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20 inventors (with patents filed for the assignee):

goldMedal John J Stephansky (6 out of 7 patents)

silverMedal Robert M Cullen (3 out of 6 patents)

bronzeMedal John N Snyder (3 out of 5 patents)

4.  Mark C Langenohl (3 out of 8 patents)

5.  Edward L Erny (3 out of 6 patents)

6.  John Thibault (3 out of 3 patents)

7.  Xiangmin Li (2 out of 2 patents)

8.  John E Berry (2 out of 2 patents)

9.  Marc N Palmisiano (1 out of 3 patents)

10.  H David Prior (1 out of 3 patents)

11.  Glenn H McIntyre, Iii (1 out of 1 patent)

12.  Thomas N Robich (1 out of 1 patent)

13.  Thomas R Kleeb (1 out of 1 patent)

14.  Peter T Sutor (1 out of 5 patents)

15.  Jean-Guy St-Hilaire (1 out of 3 patents)


21 patents:

1. RE45360 - Rotary kiln heat exchanger and method of assembling same (2015-02-02),
2. 8658552 - Chromia-containing refractory (2014-02-25),
3. RE44612 - Rotary kiln heat exchanger and method of assembling same (2013-11-25),
4. D598572 - Refractory brick (2009-08-18),
5. D591778 - Refractory block (2009-05-05),
6. D567829 - Refractory block (2008-04-29),
7. 7104789 - Wall structure for carbon baking furnace (2006-09-12),
8. 6688884 - Rotary kiln heat exchanger and method of assembling same (2004-02-10),
9. 6395662 - Non-slumping sprayable refractory castables containing thermal black (2002-05-28),
10. 6313056 - Non-slumping sprayable refractory castables containing thermal black (2001-11-06),
11. 6313055 - Refractory castables containing thermal black (2001-11-06),
12. 6268018 - Method of applying a non-slumping pumpable castable high purity silica composition (2001-07-31),
13. 6190448 - Non-slumping, pumpable castable high purity silica composition (2001-02-20),
14. 5882583 - precast module leveling assembly for a metallurgical vessel (1999-03-16),
15. 5879616 - Metallurgical vessel and method of using the same (1999-03-09),
Company Overview
Harbison-Walker Refractories Company specializes in the development and manufacturing of refractory products and solutions for high-temperature industrial applications. With a strong focus on innovation, the company serves various sectors including steel, cement, glass, and petrochemicals. Their expertise encompasses advanced materials and technologies designed to enhance performance and efficiency in extreme environments. Headquartered in Moon Township, PA, Harbison-Walker is recognized for its commitment to quality and customer service in the refractory industry.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

21 Patents

#3 in Moon Township, PA

#571 in Pennsylvania

#15,719 in US

#30,018 in the World

Moon Township, PA (US)
Moon Township, PA, United States of America

Harbison-Walker Refractories Company

Forward Citations = 82

20 inventors:

goldMedal John J Stephansky (6 out of 7 patents)

silverMedal Robert M Cullen (3 out of 6 patents)

bronzeMedal John N Snyder (3 out of 5 patents)

4.  Mark C Langenohl (3 out of 8 patents)

5.  Edward L Erny (3 out of 6 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Harbison-Walker Refractories Company. Retrieved from https://idiyas.com/company/harbison-walker-refractories-company

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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