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For the Inventor, By the Inventor

Moon Township, PA, United States of America

Harbison-walker Refractories Company


USPTO Granted Patents = 21


Trademarks = 44

Forward Citations = 80

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21 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),
Harbison-Walker Refractories Company is a leading manufacturer and supplier of ceramic refractory products. With a history dating back over 150 years, the company provides high-quality solutions for various industries including steel, cement, glass, and aluminum. Their innovative products and expertise in refractory technology make them a trusted partner for customers worldwide.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 2 2025

21 Patents

#6 in Moon Township, PA

#562 in Pennsylvania

#15,142 in US

#29,009 in the World

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Moon Township, PA, United States of America

Harbison-walker Refractories Company

Forward Citations = 80

21 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)

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