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Trademarks = 1

Forward Citations = 271

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10 inventors (with patents filed for the assignee):

William M Copa (4 out of 7 patents)

Thomas J Vollstedt (3 out of 5 patents)

Curtis D Cooley (2 out of 7 patents)

4. David S Ross (2 out of 6 patents)

5. Claude E Ellis (1 out of 4 patents)

6. Bruce L Brandenburg (1 out of 12 patents)

7. Ronald L Edwards (1 out of 2 patents)

8. John A Meidl (1 out of 4 patents)

9. John K Berrigan, Jr (1 out of 3 patents)

10. David A Beula (1 out of 1 patent)

10 patents: Sort by Forward Citations

1. 4983308 - Automatic chemical cleaning of granular medium filters (1991-01-08),

2. 4976873 - Pulsing portions of a filter cell to extend a filter run (1990-12-11),

3. 4952316 - Continuous aeration-batch clarification wastewater treatment (1990-08-28),

4. 4919815 - Two-stage anaerobic/aerobic treatment process (1990-04-24),

5. 4897196 - Two-stage batch wastewater treatment (1990-01-30),

6. 4857198 - Process for treatment of water containing volatile and toxic compounds (1989-08-15),

7. 4818414 - Slime control for primary filtration systems (1989-04-04),

8. 4812243 - Process for treating caustic cyanide metal wastes (1989-03-14),

9. 4810386 - Two-stage wastewater treatment (1989-03-07),

10. 4749492 - Process for recovering regenerated adsorbent particles and separating (1988-06-07),

Zimpro/passavant Inc. is a leading global provider of advanced water and wastewater treatment solutions. With a history of over 100 years, Zimpro/passavant offers a wide range of technologies and services to help customers achieve their water treatment goals. Their innovative solutions are used in industries such as municipal water, pulp and paper, and oil and gas. Zimpro/passavant is committed to sustainability and environmental stewardship, helping clients meet regulatory requirements while minimizing their impact on the environment.

This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 2 2025

10 Patents

#3 in Rothschild, WI

#656 in Wisconsin

#28,925 in US

#54,204 in the World

Rothschild, WI, United States of America

Zimpro/passavant Inc.