For the Inventor, By the Inventor

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Oak Brook, IL, United States of America

Portec, Inc.

Calculating rank

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):

Richard A Tatina (4 out of 15 patents)

David M Pruett (4 out of 4 patents)

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: Sort by Forward Citations

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),

Company Overview

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 synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

46 Patents

#9 in Oak Brook, IL

#413 in Illinois

#7,600 in US

#15,122 in the World

Oak Brook, IL, United States of America

Portec, Inc.

Forward Citations = 519

57 inventors:

Richard A Tatina (4 out of 15 patents)

David M Pruett (4 out of 4 patents)

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)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Portec, Inc.. Retrieved from https://idiyas.com/company/portec

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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