For the Inventor, By the Inventor

Enter assignee name

Waukesha, WI, United States of America

Envirex Inc.

USPTO Granted Patents = 63

Forward Citations = 777

Loading Chart...

Loading Chart...

53 inventors (with patents filed for the assignee):

Peter J Petit (9 out of 9 patents)

James H Wiegand (7 out of 8 patents)

Thomas J Casper (7 out of 14 patents)

4. George W Smith (5 out of 5 patents)

5. Eugene E Mazewski (5 out of 5 patents)

6. John W Wittmann (4 out of 4 patents)

7. John Thomas (4 out of 4 patents)

8. Robert R Cheesman (4 out of 5 patents)

9. William H Boyle (4 out of 4 patents)

10. John A Fillar (3 out of 3 patents)

11. Karl R Hertel (3 out of 4 patents)

12. Susan M Rasper (3 out of 4 patents)

13. Richard E Speece (2 out of 17 patents)

14. Bert Krivec (2 out of 29 patents)

15. Charles Stark Applegate (2 out of 7 patents)

Core Competencies:

Biomass Growth Control

Gas Diffusion

Clarifiers

Traveling Water Screen

Wastewater Treatment

Activated Sludge

Rotating Biological Contactor

Fluid Bed Reactor

Vaporless Containment

Pressure Relief Valve

Polymeric Components

Gravity Belt Thickener

63 patents: Sort by Forward Citations

1. 5976365 - Biomass growth control apparatus for fluid bed biological reactor (1999-11-02),

2. 5766491 - Backflow prevention system for media bed reactor (1998-06-16),

3. 5766484 - Dissolved gas floatation device (1998-06-16),

4. 5593589 - Clarifier (1997-01-14),

5. 5584996 - Apparatus and method for distributing liquid containing evolvable glass (1996-12-17),

6. 5552052 - Method of reducing iron fouling in groundwater treatment systems (1996-09-03),

7. 5538635 - Method for dissolving gas in liquid including pressurized bubble (1996-07-23),

8. 5534140 - Bar screen having compound fine screen bar rack (1996-07-09),

9. 5501793 - Traveling water screen including improved basket (1996-03-26),

10. 5489378 - Differential relief mechanism for a traveling water screen (1996-02-06),

11. 5481789 - Method for removing a gear or bearing in circular clarifiers and (1996-01-09),

12. 5470475 - Clarifier (1995-11-28),

13. 5454938 - Bed height sensing device for biological reactor (1995-10-03),

14. 5425874 - Rotating contactor including cross flow media for the biological (1995-06-20),

15. 5423980 - Wastewater treatment apparatus with ice resistant adjustable friction (1995-06-13),

Company Overview

Envirex Inc., based in Waukesha, Wisconsin, specializes in advanced wastewater treatment technologies. The company focuses on innovative solutions for biomass growth control, gas diffusion, and various treatment processes including activated sludge and rotating biological contactors. Their expertise extends to the design and manufacturing of clarifiers and fluid bed reactors, contributing to efficient and sustainable wastewater management. Envirex Inc. is dedicated to enhancing environmental quality through effective treatment systems tailored to diverse industrial needs.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

63 Patents

#4 in Waukesha, WI

#144 in Wisconsin

#5,767 in US

#11,640 in the World

Waukesha, WI, United States of America

Envirex Inc.

Forward Citations = 777

53 inventors:

Peter J Petit (9 out of 9 patents)

James H Wiegand (7 out of 8 patents)

Thomas J Casper (7 out of 14 patents)

4. George W Smith (5 out of 5 patents)

5. Eugene E Mazewski (5 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Envirex Inc.. Retrieved from https://idiyas.com/company/envirex

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]

Loading…