For the Inventor, By the Inventor

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Minneapolis, MN, United States of America

Xerxes Corporation

USPTO Granted Patents = 25

% Expired Patents = 28.0

Trademarks = 4

Forward Citations = 178

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28 inventors (with patents filed for the assignee):

John R Burwell (14 out of 15 patents)

Robin Berg (11 out of 17 patents)

Robin L Berg, Sr (7 out of 16 patents)

4. Albert F Dorris (4 out of 5 patents)

5. Douglas Morrissette (3 out of 3 patents)

6. Michael G Zais (3 out of 3 patents)

7. John Richard Smith (3 out of 97 patents)

8. David Grams (2 out of 2 patents)

9. Roberto Sanchez (2 out of 2 patents)

10. Brian Garcia (2 out of 4 patents)

11. Kaushik Mallick (2 out of 4 patents)

12. Don Abel (1 out of 1 patent)

13. Chester Batzkiel (1 out of 1 patent)

14. Greg Carty (1 out of 1 patent)

15. Onesimo Gomez (1 out of 1 patent)

Core Competencies:

Storage Tanks

Leak Detection

Buoyancy Calculations

Seismic Evaluation

Septic Tanks

Containment Sumps

Pressure Testing

Corrosion Resistance

Oil-Water Separator

High Strength Rib

Tank Retaining System

Water-Tight Riser

25 patents: Sort by Forward Citations

1. 8091728 - Wet well apparatus with base form and installation method regarding same (2012-01-10),

2. 7337590 - Tank retaining system (2008-03-04),

3. 7229233 - Double walled containment sumps (2007-06-12),

4. 7150582 - Form for street box in underground storage tank installation (2006-12-19),

5. 7028967 - Tank retaining system (2006-04-18),

6. 6889865 - Method and apparatus for pressure testing storage tanks (2005-05-10),

7. 6820762 - High strength rib for storage tanks (2004-11-23),

8. 6786689 - Low profile deadman and method for shipping the same with a tank (2004-09-07),

9. 6564614 - Method and apparatus for vacuum testing water resistant and watertight risers and lids (2003-05-20),

10. 6558535 - Residential septic tank with seams above sewage line and residential septic tank with stepped ribs (2003-05-06),

11. 6551024 - System and method for detecting leaks in underground storage tank (2003-04-22),

12. 6517719 - Oil and water separator (2003-02-11),

13. 6467344 - Underground storage tank buoyancy and buoyancy safety factor calculation method and apparatus (2002-10-22),

14. 6398057 - Triple walled underground storage tank (2002-06-04),

15. 6397168 - Seismic evaluation method for underground structures (2002-05-28),

Company Overview

Xerxes Corporation, based in Minneapolis, MN, specializes in the development and manufacturing of advanced containment solutions. The company focuses on providing innovative products for environmental protection, particularly in the areas of water and wastewater management. With a strong emphasis on engineering and technology, Xerxes is dedicated to creating durable and reliable systems that meet the needs of various industries, ensuring safety and compliance with environmental standards.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

25 Patents

#77 in Minneapolis, MN

#400 in Minnesota

#13,350 in US

#25,681 in the World

Minneapolis, MN, United States of America

Xerxes Corporation

Forward Citations = 178

28 inventors:

John R Burwell (14 out of 15 patents)

Robin Berg (11 out of 17 patents)

Robin L Berg, Sr (7 out of 16 patents)

4. Albert F Dorris (4 out of 5 patents)

5. Douglas Morrissette (3 out of 3 patents)

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

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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