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For the Inventor, By the Inventor

Oak Brook, IL, United States of America

Portec, Inc.


USPTO Granted Patents = 46

% Expired Patents = 2.2

Trademarks = 2

Forward Citations = 519

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57 inventors (with patents filed for the assignee):

goldMedal Richard A Tatina (4 out of 15 patents)

silverMedal David M Pruett (4 out of 4 patents)

bronzeMedal James C Robertson (4 out of 4 patents)

4.  David A Stoller, Sr (4 out of 4 patents)

5.  Robert D Brown (3 out of 3 patents)

6.  Richard A Compton (3 out of 3 patents)

7.  Chandrakant D Ravani (3 out of 3 patents)

8.  Richard L Fischer (3 out of 3 patents)

9.  William Thomas Urmson, Jr (2 out of 14 patents)

10.  Ronald K Junk (2 out of 5 patents)

11.  Rodney R Mishmash (2 out of 2 patents)

12.  John Ivey (2 out of 2 patents)

13.  Russell J Hogsett (2 out of 2 patents)

14.  Thomas R Walker (2 out of 2 patents)

15.  John P Dorscht (2 out of 5 patents)


Core Competencies:
Ball Transfer Device
Knife Edge Converter
Screening Apparatus
Molded Spiral Chute
Hammer Mills
Sortation Table
Rail Lubrication
Conveyor Belts
Freight Rail Car
Variable Follower Rest
Rail Fastener
End Enclosure

46 patents:

1. 7650979 - Ball transfer device (2010-01-26),
2. 6050395 - Knife edge converter (2000-04-18),
3. 5732827 - Screening apparatus (1998-03-31),
4. 5598914 - Removable sidewall for a molded spiral chute (1997-02-04),
5. 5484111 - Hammers for hammer mills (1996-01-16),
6. 5482152 - Sortation table (1996-01-09),
7. 5394977 - Apparatus and method for use in replacing conveyor belts (1995-03-07),
8. 5394958 - Rail lubrication apparatus (1995-03-07),
9. 5348120 - Rail lubrication apparatus (1994-09-20),
10. 5294065 - Portable screening/dosing/mixing plant (1994-03-15),
11. 5143207 - Tension controlling and shock absorbing apparatus for an endless conveyor (1992-09-01),
12. 5060788 - Chain guide mounting apparatus (1991-10-29),
13. 4974215 - Loading dock range finding system (1990-11-27),
14. 4930621 - Attachments for power turns (1990-06-05),
15. 4887708 - Drive apparatus for belt power turns (1989-12-19),
Portec, Inc. is a specialized manufacturer based in Oak Brook, Illinois, focusing on innovative solutions for material handling and transportation systems. The company develops a range of products including ball transfer devices, knife edge converters, and screening apparatuses, which enhance operational efficiency in various industries. Portec's expertise extends to molded spiral chutes, hammer mills, sortation tables, and rail lubrication apparatus, providing comprehensive solutions for conveyor belt replacement and related applications.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

Portec, Inc.
46 Patents

#9 in Oak Brook, IL

#412 in Illinois

#7,585 in US

#15,085 in the World

Oak Brook, IL (US)
Oak Brook, IL, United States of America

Portec, Inc.

Forward Citations = 519

57 inventors:

goldMedal Richard A Tatina (4 out of 15 patents)

silverMedal David M Pruett (4 out of 4 patents)

bronzeMedal James C Robertson (4 out of 4 patents)

4.  David A Stoller, Sr (4 out of 4 patents)

5.  Robert D Brown (3 out of 3 patents)

Please report any incorrect information to [email protected]
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